What does += mean in c++

The = operator is used in C to sum the value of a variable with an expression and then store it back into a variable, equivalent to variable = variable expression. Advantages include code simplicity, high readability, and improved efficiency.

= The meaning of operator in C

= operator is a compound assignment operator used for Sums the value of a variable with an expression and stores the result back in the variable.

Syntax:

<code class="cpp">variable += expression;</code>

Equivalent to:

<code class="cpp">variable = variable + expression;</code>

Example:

<code class="cpp">int x = 10;
x += 5; // 等价于 x = x + 5</code>

After executing the above code, the value of x is 15.

Advantages:

• Simplifies the code, making it more concise and readable.
• Improves efficiency because the creation of intermediate variables is avoided.

Note:

= operator can only be used for numeric types. For non-numeric types, use the combining assignment operators, such as =.

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