What does !x mean in c language?

In C language, "!" is a logical NOT operator. It inverts a Boolean value, converting True to False and False to True. Syntax: !x; where x is a Boolean expression or integer value. !x returns False if x is True or nonzero; !x returns True if x is False or zero.

What does !x mean in c language?

In C language, the "!" operator is a logical NOT operator, which inverts a Boolean value. In other words, it converts True to False and False to True.

How it works:

Syntax: !x

Among them:

• ## x is a Boolean expression or integer value
If
• x is True or non-zero, !x returns False
if
• x is False or zero, then !x returns True

Example:

<code class="c">int x = 5;
int y = !x; // y 为 False

int z = 0;
int w = !z; // w 为 True</code>

Application:

The logical NOT operator can be used to:

Reverse a Boolean expression.
• Check if the condition is false.
• Convert an integer value to a Boolean value (non-zero is True, zero is False).
• Realize exclusive OR (XOR) operation (x XOR y = !x ^ !y).

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