What does == mean in c language

The "==" operator in C language is used to compare whether the values ​​of two expressions are equal and return a Boolean value (true/false): if the expressions are equal, true is returned. Returns false if the expressions are not equal.

== in C language represents the equality comparison operator.

Equality comparison operator (==)

== operator is used to compare whether the values ​​of two expressions are equal. It returns a Boolean value (true or false):

• The result is true if two expressions are equal.
• If the two expressions are not equal, the result is false.

Grammar:

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

Where:

• ##expression1 and expression2 are the two expressions to be compared.

Example:

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

if (a == b) {
  // a 和 b 相等
} else {
  // a 和 b 不相等
}</code>

if statement checks the variables a and b Whether they are equal. If they are equal, the first code block is executed; otherwise, the second code block is executed.

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