x--what does it mean in c language

x--What does it mean in C language?

x--In C language, it is a postfix decrement operator, which decreases the value of the operand variable by 1. It is a postfix operator, which means it appears after the variable name.

Usage:

x--operator is used to subtract 1 from the value of a variable and return the subtracted value. The syntax is as follows:

<code>x--;</code>

How it works:

x--operator works in the following steps:

1. Evaluates the value of the operand variable .
2. Decrease the value of the operand by 1.
3. Store the subtracted value back into the operand variable.

Example:

<code class="c">int x = 5;

printf("x before decrement: %d\n", x); // 输出：5

x--;

printf("x after decrement: %d\n"); // 输出：4</code>

In the above example, the x-- operator subtracts the value of variable x from 5 by 1, and adds The value 4 is stored back in the x variable.

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