What does x-= mean in C language?

In C language, the x-= operator subtracts 1 from the current value of x, which is equivalent to x = x - 1. It is used to simplify the code and increase readability and conciseness. Other compound assignment operators include: =, *=, /=, %=, <<=, >>=, &=, |=, ^=.

The meaning of x-= in C language

In C language, x-= operator is a compound assignment operator, which is equivalent to x = x-1.

How to operate

x-= operator subtracts 1 from the current value of variable x and stores the result back in x.

Syntax

<code class="c">x -= 1;</code>

Example

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

x -= 1; // 等同于 x = x - 1

printf("x 的值现在为: %d\n", x); // 输出 4</code>

Advantages

Compound assignment operation Symbols can simplify code, making it more readable and concise.

Other compound assignment operators

The C language also provides other compound assignment operators, including:

• =: Add a value
• -=: Subtract a value
• *=: Multiply by a value
• /=: Divide by a value
• %=: Find the remainder A value
• <<=: Shift one value to the left

• =: Shift one value to the right

##&= : Bitwise AND a value
• |= : Bitwise OR a value
• ^= : Bitwise XOR a value

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