What does equal to equal mean in c language

The equality operator (==) in C language is used to compare whether the values ​​of two expressions are equal, and returns 1 (true) for equality and 0 (false) for inequality.

Equal to equal operator (==) in C language

In C language, equal to equal to operator (==) is a Boolean operator used to compare the values ​​of two expressions for equality. It returns a boolean value that is true (1) if the expressions are equal, false (0) otherwise.

Grammar

<code class="c">expression1 == expression2</code>

Among them:

• expression1 and expression2 are to be compared expression.

Return value

• If expression1 and expression2 are equal, return 1 (true) .
• Returns 0 (false) if expression1 and expression2 are not equal.

Example

<code class="c">int a = 5;
int b = 5;

if (a == b) {
  printf("a 和 b 相等\n");
} else {
  printf("a 和 b 不相等\n");
}</code>

Output:

<code>a 和 b 相等</code>

Because the values ​​of a and b are both 5, so a == b is true.

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