In C language, the difference between = and ==

In C language, the "=" assignment operator is used to assign values ​​to variables, while the "==" equality comparison operator is used to compare whether the values ​​​​of two expressions are equal. Return true to indicate equality, false Indicates inequality.

The difference between "=" and "==" in C language

In C language, "= " and "==" are two different operators with different functions.

"=": assignment operator

Assignment operator "=" is used to assign a value to a variable. For example:

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

This statement assigns the value 5 to variable x.

"==": Equality comparison operator

Equality comparison operator "==" is used to compare whether the values ​​of two expressions are equal. Unlike "=", "==" does not perform an assignment, but returns a bool value representing the result of the comparison:

• Returns true if the two expressions are equal.
• If the two expressions are not equal, return false.

For example:

<code class="c">int x = 5;
if (x == 5) {
  // 执行语句 ...
}</code>

This if statement uses "==" to compare whether the value of variable x is equal to 5. If true, the statements in the if block are executed.

Summary

• "=" is the assignment operator, used to assign a value to a variable.
• "==" is the equality comparison operator, used to compare whether the values ​​of two expressions are equal.

The above is the detailed content of In C language, the difference between = and ==. For more information, please follow other related articles on the PHP Chinese website!