x === "10" is false
You use logical operators when you need to determine the logic between certain values.
Going back to the shopping cart script example, you might want your script to apply a 5% discount if the following 2 conditions are both true : a given product costs more than $20 and is purchased before the 31st of December.
Here come logical operators to the rescue. Given that x = 10 and y = 5:
Operator | What is it? | Example |
---|---|---|
&& | and | (x < 20 && y > 1) is true both conditions must be satisfied |
|| | or | (x == 5 || y == 5) is true at least 1 condition must be satisfied |
! | not | !(x == y) is true |
The tables above are self-explanatory, except for the following 2 questions:
Values are the specific data, either directly in your JavaScript statements or contained in JavaScript variables. For example:
In the code snippet above, the variable price has value 5 .
What's the type ?
The type, or more precisely the data type , is the way JavaScript classifies data. You've come across 2 data types, that is, number and string (text) . A third data type is Boolean , that is, true and false statements .
Therefore, when you compare 2 values using ( === ), the 2 values are compared on the basis of both their value and their data type :
Browser compatibility.
An assignment operator assigns a value to its left operand based on the value of its right operand.
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The basic assignment operator is equal ( = ), which assigns the value of its right operand to its left operand. That is, x = y assigns the value of y to x . The other assignment operators are usually shorthand for standard operations, as shown in the following definitions and examples.
Name | Shorthand operator | Meaning |
---|---|---|
Simple assignment operator is used to assign a value to a variable. The assignment operation evaluates to the assigned value. Chaining the assignment operator is possible in order to assign a single value to multiple variables. See the example.
The addition assignment operator adds the value of the right operand to a variable and assigns the result to the variable. The types of the two operands determine the behavior of the addition assignment operator. Addition or concatenation is possible. See the addition operator for more details.
The subtraction assignment operator subtracts the value of the right operand from a variable and assigns the result to the variable. See the subtraction operator for more details.
The multiplication assignment operator multiplies a variable by the value of the right operand and assigns the result to the variable. See the multiplication operator for more details.
The division assignment operator divides a variable by the value of the right operand and assigns the result to the variable. See the division operator for more details.
The remainder assignment operator divides a variable by the value of the right operand and assigns the remainder to the variable. See the remainder operator for more details.
The exponentiation assignment operator evaluates to the result of raising first operand to the power second operand. See the exponentiation operator for more details.
The left shift assignment operator moves the specified amount of bits to the left and assigns the result to the variable. See the left shift operator for more details.
The right shift assignment operator moves the specified amount of bits to the right and assigns the result to the variable. See the right shift operator for more details.
The unsigned right shift assignment operator moves the specified amount of bits to the right and assigns the result to the variable. See the unsigned right shift operator for more details.
The bitwise AND assignment operator uses the binary representation of both operands, does a bitwise AND operation on them and assigns the result to the variable. See the bitwise AND operator for more details.
The bitwise XOR assignment operator uses the binary representation of both operands, does a bitwise XOR operation on them and assigns the result to the variable. See the bitwise XOR operator for more details.
The bitwise OR assignment operator uses the binary representation of both operands, does a bitwise OR operation on them and assigns the result to the variable. See the bitwise OR operator for more details.
In unusual situations, the assignment operator (e.g. x += y ) is not identical to the meaning expression (here x = x + y ). When the left operand of an assignment operator itself contains an assignment operator, the left operand is evaluated only once. For example:
Specification | Status | Comment |
---|---|---|
Draft | ||
Standard | ||
Standard | ||
Standard | Initial definition. |
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | Safari on iOS | Samsung Internet | Node.js | |
) | Chrome Yes | Edge Yes | Firefox 1 | IE Yes | Opera Yes | Safari Yes | WebView Android Yes | Chrome Android Yes | Edge Mobile Yes | Firefox Android 4 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes | nodejs Yes |
) | Chrome Yes | Edge Yes | Firefox 1 | IE Yes | Opera Yes | Safari Yes | WebView Android Yes | Chrome Android Yes | Edge Mobile Yes | Firefox Android 4 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes | nodejs Yes |
) | Chrome Yes | Edge Yes | Firefox 1 | IE Yes | Opera Yes | Safari Yes | WebView Android Yes | Chrome Android Yes | Edge Mobile Yes | Firefox Android 4 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes | nodejs Yes |
) | Chrome Yes | Edge Yes | Firefox 1 | IE Yes | Opera Yes | Safari Yes | WebView Android Yes | Chrome Android Yes | Edge Mobile Yes | Firefox Android 4 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes | nodejs Yes |
) | Chrome Yes | Edge Yes | Firefox 1 | IE Yes | Opera Yes | Safari Yes | WebView Android Yes | Chrome Android Yes | Edge Mobile Yes | Firefox Android 4 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes | nodejs Yes |
) | Chrome 52 | Edge | Firefox 52 | IE No | Opera Yes | Safari 10.1 | WebView Android 51 | Chrome Android 52 | Edge Mobile | Firefox Android 52 | Opera Android Yes | Safari iOS 10.1 | Samsung Internet Android 6.0 | nodejs 7.0.0 7.0.0 6.5.0 From version 6.5.0: this feature is behind the runtime flag. |
) | Chrome Yes | Edge Yes | Firefox 1 | IE Yes | Opera Yes | Safari Yes | WebView Android Yes | Chrome Android Yes | Edge Mobile Yes | Firefox Android 4 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes | nodejs Yes |
) | Chrome Yes | Edge Yes | Firefox 1 | IE Yes | Opera Yes | Safari Yes | WebView Android Yes | Chrome Android Yes | Edge Mobile Yes | Firefox Android 4 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes | nodejs Yes |
) | Chrome Yes | Edge Yes | Firefox 1 | IE Yes | Opera Yes | Safari Yes | WebView Android Yes | Chrome Android Yes | Edge Mobile Yes | Firefox Android 4 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes | nodejs Yes |
) | Chrome Yes | Edge Yes | Firefox 1 | IE Yes | Opera Yes | Safari Yes | WebView Android Yes | Chrome Android Yes | Edge Mobile Yes | Firefox Android 4 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes | nodejs Yes |
) | Chrome Yes | Edge Yes | Firefox 1 | IE Yes | Opera Yes | Safari Yes | WebView Android Yes | Chrome Android Yes | Edge Mobile Yes | Firefox Android 4 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes | nodejs Yes |
) | Chrome Yes | Edge Yes | Firefox 1 | IE Yes | Opera Yes | Safari Yes | WebView Android Yes | Chrome Android Yes | Edge Mobile Yes | Firefox Android 4 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes | nodejs Yes |
) | Chrome Yes | Edge Yes | Firefox 1 | IE Yes | Opera Yes | Safari Yes | WebView Android Yes | Chrome Android Yes | Edge Mobile Yes | Firefox Android 4 | Opera Android Yes | Safari iOS Yes | Samsung Internet Android Yes | nodejs Yes |
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Assignment operators in programming are symbols used to assign values to variables. They offer shorthand notations for performing arithmetic operations and updating variable values in a single step. These operators are fundamental in most programming languages and help streamline code while improving readability.
Table of Content
Assignment operators are used in programming to assign values to variables. We use an assignment operator to store and update data within a program. They enable programmers to store data in variables and manipulate that data. The most common assignment operator is the equals sign ( = ), which assigns the value on the right side of the operator to the variable on the left side.
Below is a table summarizing common assignment operators along with their symbols, description, and examples:
Operator | Description | Examples |
---|---|---|
= (Assignment) | Assigns the value on the right to the variable on the left. | assigns the value 10 to the variable x. |
+= (Addition Assignment) | Adds the value on the right to the current value of the variable on the left and assigns the result to the variable. | is equivalent to |
-= (Subtraction Assignment) | Subtracts the value on the right from the current value of the variable on the left and assigns the result to the variable. | is equivalent to |
*= (Multiplication Assignment) | Multiplies the current value of the variable on the left by the value on the right and assigns the result to the variable. | is equivalent to |
/= (Division Assignment) | Divides the current value of the variable on the left by the value on the right and assigns the result to the variable. | is equivalent to |
%= (Modulo Assignment) | Calculates the modulo of the current value of the variable on the left and the value on the right, then assigns the result to the variable. | is equivalent to |
Here are the implementation of Assignment Operator in C language:
Here are the implementation of Assignment Operator in C++ language:
Here are the implementation of Assignment Operator in java language:
Here are the implementation of Assignment Operator in python language:
Here are the implementation of Assignment Operator in C# language:
Here are the implementation of Assignment Operator in javascript language:
In conclusion, assignment operators in programming are essential tools for assigning values to variables and performing operations in a concise and efficient manner. They allow programmers to manipulate data and control the flow of their programs effectively. Understanding and using assignment operators correctly is fundamental to writing clear, efficient, and maintainable code in various programming languages.
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I tried to add "1fr " to a DOM element’s style many times using a for loop and the "+=" operator, but it only applied once, no matter how many times I ran the loop. So, I would like to know why it behaves this way. Here’s a little bit of my code.
Since, I couldn’t get it to work, I wrote a function to repeat the string and used that to generate as many "1fr " s as I needed in one string like so.
And that works fine, but I’d still love to know why my previous attempt failed.
When assigning the string, any trailing space is automatically removed. So instead of using trailing space, use leading space:
But instead of looping, it's better to outright use the repeat() CSS function:
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Use the correct assignment operator that will result in x being 15 (same as x = x + y ). Start the Exercise. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
The assignment operator is completely different from the equals (=) sign used as syntactic separators in other locations, which include:Initializers of var, let, and const declarations; Default values of destructuring; Default parameters; Initializers of class fields; All these places accept an assignment expression on the right-hand side of the =, so if you have multiple equals signs chained ...
Learn the basics of HTML in a fun and engaging video tutorial. Templates. We have created a bunch of responsive website templates you can use - for free! Web Hosting. ... The Addition Assignment Operator (+=) adds a value to a variable. Assignment. let x = 10; x += 5;
An assignment operator assigns a value to its left operand based on the value of its right operand. The simple assignment operator is equal (=), which assigns the value of its right operand to its left operand.That is, x = f() is an assignment expression that assigns the value of f() to x. There are also compound assignment operators that are shorthand for the operations listed in the ...
Division Assignment Operator (/=) The Division Assignment operator divides a variable by the value of the right operand and assigns the result to the variable. Example: JavaScript. let yoo = 10; const moo = 2; // Expected output 5 console.log(yoo = yoo / moo); // Expected output Infinity console.log(yoo /= 0); Output:
An assignment operator assigns a value to its left operand based on the value of its right operand.. Overview. The basic assignment operator is equal (=), which assigns the value of its right operand to its left operand.That is, x = y assigns the value of y to x.The other assignment operators are usually shorthand for standard operations, as shown in the following definitions and examples.
Addition assignment operator. The addition assignment operator += is used to add the value of the right operand to the value of the left operand and assigns the result to the left operand.. On the basis of the data type of variable, the addition assignment operator may add or concatenate the variables.
An assignment operator ( =) assigns a value to a variable. The syntax of the assignment operator is as follows: let a = b; Code language: JavaScript (javascript) In this syntax, JavaScript evaluates the expression b first and assigns the result to the variable a. The following example declares the counter variable and initializes its value to zero:
An assignment operator assigns a value to its left operand based on the value of its right operand.. Overview. The basic assignment operator is equal (=), which assigns the value of its right operand to its left operand.That is, x = y assigns the value of y to x.The other assignment operators are usually shorthand for standard operations, as shown in the following definitions and examples.
The JavaScript Assignment operators are used to assign values to the declared variables. Equals (=) operator is the most commonly used assignment operator. For example: var i = 10; The below table displays all the JavaScript assignment operators. JavaScript Assignment Operators. Example. Explanation. =.
The shorthand assignment operator += can also be used to concatenate strings. For example, var mystring = 'alpha'; mystring += 'bet'; // evaluates to "alphabet" and assigns this value to mystring. Conditional (ternary) operator. The conditional operator is the only JavaScript operator that takes three operands. The operator can have one of two ...
Assignment operators. An assignment operator assigns a value to its left operand based on the value of its right operand.. Overview. The basic assignment operator is equal (=), which assigns the value of its right operand to its left operand.That is, x = y assigns the value of y to x.The other assignment operators are usually shorthand for standard operations, as shown in the following ...
The first operand must be a variable and basic assignment operator is equal (=), which assigns the value of its right operand to its left operand. That is, a = b assigns the value of b to a. In addition to the regular assignment operator "=" the other assignment operators are shorthand for standard operations, as shown in the following table.
A simple assignment operator is equal (=) operator. In the JavaScript statement "let x = 10;", the = operator assigns 10 to the variable x. We can combine a simple assignment operator with other type of operators such as arithmetic, logical, etc. to get compound assignment operators. Some arithmetic assignment operators are +=, -=, *=, /=, etc.
2. JavaScript Assignment Operators. We use assignment operators to assign values to variables. For example, let x = 5; Here, we used the = operator to assign the value 5 to the variable x. Commonly Used Assignment Operators
In the previous lesson you already employed an assignment operator ( = ) and an arithmetic operator, specifically the multiplication operator ( * ), to write a basic JavaScript shopping cart script. We can easily see that to do something useful with JavaScript, we need a way to manipulate data and variables. We do this with operators.
The addition assignment ( +=) operator performs addition (which is either numeric addition or string concatenation) on the two operands and assigns the result to the left operand. Try it. Syntax. js. x += y. Description. x += y is equivalent to x = x + y, except that the expression x is only evaluated once. Examples.
The = operator is an assignment operator. You are assigning an object to a value. The == operator is a conditional equality operation. You are confirming whether two things have equal values. There is also a === operator. This compares not only value, but also type. Assignment Operators. Comparison Operators
This is a piece of code from a simple Bookmarker App I made. I am kind of confused about something here. Look at the 3rd line of the code. Isn't there supposed to be == instead of = after classname? Because = is an assignment operator. What I need is true which == or === should give and it indeed does from the console.log.. However when I use === inside the if statement the function no longer ...
The basic assignment operator is equal ( = ), which assigns the value of its right operand to its left operand. That is, x = y assigns the value of y to x. The other assignment operators are usually shorthand for standard operations, as shown in the following definitions and examples. Name. Shorthand operator.
Assignment operators are used in programming to assign values to variables. We use an assignment operator to store and update data within a program. They enable programmers to store data in variables and manipulate that data. The most common assignment operator is the equals sign (=), which assigns the value on the right side of the operator to ...
x ||= y. Description. Logical OR assignment short-circuits, meaning that x ||= y is equivalent to x || (x = y), except that the expression x is only evaluated once. No assignment is performed if the left-hand side is not falsy, due to short-circuiting of the logical OR operator. For example, the following does not throw an error, despite x ...
I tried to add "1fr "to a DOM element's style many times using a for loop and the "+=" operator, but it only applied once, no matter how many times I ran the loop. So, I would like to know why it behaves this way. Here's a little bit of my code. for (i = 1; i <= number; i++){ sketchPadElement.style.gridTemplateColumns += "1fr "; }