What does x*=x mean in C language?

The meaning of x=x in C language is to multiply the variable x by itself and reassign the result to x, which is equivalent to x = x x. The specific process includes: calculating the square of x x * x, and then assigning the obtained value to x.

The meaning of x*=x in c language

The operator = in c language means Multiply and assign multiplies the variable x by itself and reassigns the result to x. In other words, x=x is equivalent to x = x * x.

Expand explanation:

• x is a variable: x is a variable that stores a certain value.
• = Assignment operator for multiplication: = Multiplies a variable with the value on its right and reassigns the result to the variable itself.
• x * x: x multiplied by itself means finding the square of x.

Therefore, the specific process of x*=x is as follows:

1. Calculate the square of x, that is, x * x.
2. Reassign the squared value to x, that is, x = x * x.

Example:

The following example shows how x*=x works:

<code class="c">int x = 5;
x *= x;
printf("%d\n", x); // 输出：25</code>

In this example:

• The initial x value is 5.
• x*=x calculates 5 squared, which is 25.
• 25 Reassign to x.
• printf prints the reassigned value of x, which is 25.

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