Detailed explanation of the role and examples of += in C language

The = operator is a compound assignment operator in C language, which modifies the value of the variable by adding it to itself plus a given value. Usage: Variable = constant/variable/expression;, where variable is a modifiable value, constant is an unmodifiable value, and expression is any expression that can be evaluated.

=Detailed explanation of the role and examples of operators in C language

In C language, =operator is a compound Assignment operator, which adds a given value to the value of a variable and itself. Unlike the equals (=) assignment operator, the = operator modifies the value of a variable rather than replacing it with a new value.

Grammar

=The syntax of the operator is as follows:

变量 += 常量/变量/表达式;

Among them, variable is a value that can be modified,Constant is an unmodifiable value, Variable/expression is any expression that can be evaluated.

Function

The = operator performs the following operations:

1. Converts the value of the variable to a constant /Variable/ExpressionThe results after evaluation are added.
2. Store the calculation results in variables .

Practical Case

Here are some practical examples of the = operator:

Example 1: Add a constant to a variable Medium

int a = 10;
a += 5; // 将5添加到a中
// a的值现在是15

Example 2: Add the value of another variable to a variable

int b = 5;
int c = 10;
b += c; // 将c的值添加到b中
// b的值现在是15

Example 3: Add the result of an expression to

int d = 10;
d += (2 * 5); // 将2 * 5表达式的结果添加到d中
// d的值现在是20

in variables Note that the

= operator can only be used for variables that can be modified. If you try to use the = operator on a variable that cannot be modified (such as a literal or constant), it will produce a compilation error.

The above is the detailed content of Detailed explanation of the role and examples of += in C language. For more information, please follow other related articles on the PHP Chinese website!