JavaScript Compound Assignment With Augmented Multiplication

The compound assignment operator with augmented multiplication (*=) is an operator that combines the multiplication and assignment operators. It takes the form of x *= y, and is equivalent to x = x * y.

This operator can be used to multiply a variable by a value and assign the result to the same variable, all in a single statement.

For example:

let x = 5;
x *= 2;
console.log(x);  // Output: 10

Here, the variable x is initialized with the value 5, and then multiplied by 2 using the compound assignment operator. The result of 5 * 2 is 10, which is then assigned back to x. The final value of x is 10.

The compound assignment with augmented multiplication operator can be used with any data type that can be multiplied, including numbers and strings.

For example:

let str = "Hello";
str *= 3;
console.log(str);  // Output: "HelloHelloHello"

Here, the string "Hello" is multiplied by 3, which results in a new string that is the concatenation of three copies of the original string. The final value of str is "HelloHelloHello".

It’s important to note that the compound assignment with augmented multiplication operator does not support the multiplication of a string and a number. If you try to use it in this way, you will get a NaN (Not a Number) result.

Here are a few more examples of using the compound assignment with augmented multiplication operator:

let a = 2;
let b = 3;

a *= b;
console.log(a);  // Output: 6

b *= a;
console.log(b);  // Output: 18

let c = "5";
c *= 2;
console.log(c);  // Output: 10

let d = "Hello";
d *= 3;
console.log(d);  // Output: "HelloHelloHello"

let e = "5";
e *= "2";
console.log(e);  // Output: NaN

In the first example, the variables a and b are both multiplied using the compound assignment operator, and the results are assigned back to the same variables.

In the second example, the string "5" is multiplied by 2, which results in a number (10).

In the third example, the string "Hello" is multiplied by 3, which results in a new string that is the concatenation of three copies of the original string.

In the fourth example, the string "5" is multiplied by the string "2", which is not a valid operation and results in NaN.

I hope these examples help clarify how the compound assignment with augmented multiplication operator works. Let me know if you have any more questions!