In JavaScript, the compound assignment operator with augmented division (/=) is used to divide the value of a variable by a given number and assign the result back to the variable. This operator can be written as:
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variable /= value
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Here’s an example of how you might use the compound assignment operator with augmented division:
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let x = 10; x /= 2; console.log(x); // Output: 5
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This code first declares a variable x and assigns it the value of 10. Then, it uses the compound assignment operator with augmented division to divide x by 2 and assign the result back to x. Finally, it logs the value of x to the console, which is 5.
You can also use this operator with variables and expressions:
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let y = 20; let z = 2; y /= z; console.log(y); // Output: 10 let a = 10; let b = 5; let c = 2; a /= b + c; console.log(a); // Output: 1
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The compound assignment operator with augmented division is a shorthand way of writing the following code:
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variable = variable / value;
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It can make your code more concise and easier to read, especially when you’re performing multiple operations on the same variable.
Here are a few more things you might want to know about the compound assignment operator with augmented division:
- This operator can be used with any value that can be converted to a number, including strings, booleans, and
nullvalues. For example:
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let x = "10"; x /= 2; console.log(x); // Output: 5 let y = true; y /= 2; console.log(y); // Output: 0.5 let z = null; z /= 2; console.log(z); // Output: 0
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- If the value you’re dividing by is
0, you’ll get the special valueInfinity, which represents positive infinity. For example:
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let x = 10; x /= 0; console.log(x); // Output: Infinity
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- If you try to divide by
0and assign the result to a variable that’s already set toInfinity, the result will beNaN, which stands for “not a number”. For example:
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let x = Infinity; x /= 0; console.log(x); // Output: NaN
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- The compound assignment operator with augmented division has a higher precedence than most other operators, so you’ll need to use parentheses if you want to change the order of operations. For example:
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let x = 10; x /= (2 + 3); // x is divided by 5 console.log(x); // Output: 2
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