What does != mean in c++

!= in C is a binary operator, which means "not equal to". It is used to compare whether two expressions are equal. If they are different, it returns true, otherwise it returns false. The syntax is expression1 != expression2, where expression1 and expression2 are the expressions or variables to be compared.

The meaning of != in C

In the C programming language, != is a binary operator , means "not equal to".

Purpose

!= operator is used to compare whether two expressions or variables are equal. Returns true if the values ​​of the two expressions or variables are different; false otherwise.

Syntax

!= The syntax of the operator is as follows:

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

Where expression1 and expression2 are the two expressions or variables to be compared.

Example

The following example demonstrates the use of the != operator:

<code class="cpp">int a = 10;
int b = 20;

bool result = (a != b); // result 为 true</code>

In this example, we compare variables a and b to see if they are not equal. Since a has a value of 10 and b has a value of 20, they are not equal, so the value of result is true.

Note

!= operator is the opposite of == operator. The == operator means "equal to", while the != operator means "not equal to".

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