What do x+ and x- mean in C language?

In C language, x and x- represent the postfix increment and postfix decrement operators, which increase or decrease the value of the variable by 1 respectively, and then return the modified value, which is suitable for integer variables.

The meaning of x and x- in C language

In C language, x and x- respectively represent the following operations:

• x : Postfix increment operator, which increases the value of variable x by 1, and then Returns the modified value.

  • Syntax: x

  • Example:

    <code class="c">int x = 5;
    printf("%d\n", x++); // 输出 5，然后 x 的值变为 6
    printf("%d\n", x); // 输出 6</code>

• x-: Postfix decrement operator, which decreases the value of variable x by 1 and returns the modified value.

  • Syntax: x--

  • Example:

    <code class="c">int x = 5;
    printf("%d\n", x--); // 输出 5，然后 x 的值变为 4
    printf("%d\n", x); // 输出 4</code>

It should be noted that the x and x- operators only apply to integer variables. They modify the value of a variable to the modified value, so these operators are commonly used in loops, conditional statements, and increment/decrement counters.

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