What does x=-x mean in C language?

In C language, x=-x means to assign the variable x to its opposite number. Here are the steps: Use the minus operator to invert the current value of x. Assign the negative value to x.

x=-x means in C language

In C language, x=-x means Then assign the variable x to its opposite number.

Detailed explanation:

• Negative sign (-) operator: The negative sign operator is used to invert a number . For example, the opposite of -5 is 5.
• Assignment operator (=): The assignment operator is used to assign a value to a variable. For example, x = 10 assigns the value 10 to variable x.

Thus, x=-x means the following:

1. Use the negative sign operator to invert the current value of x.
2. Assign the obtained opposite number to x.

Example:

<code class="c">int x = 5;
x = -x; // x 现在为 -5</code>

In this example, the initial value of variable x is 5. The expression x=-x then inverts the value of x (-5) and assigns it to x. Therefore, the final value of x is -5.

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