What does the percent sign e mean in C language?

In C language, the percent sign (%) represents the modulus operation, which is used to calculate the remainder after dividing two integers. It works with integer data types, including int, long int, and long long int. Please note when using: the divisor cannot be 0, otherwise an error will occur; the sign of the remainder is the same as the dividend; the operator has higher priority.

The meaning of the percent sign (%) in C language

The percent sign (%) in C language ) operator is used to calculate the modulus, which is the remainder after dividing two integers. It works with integer operations, including int, long int, and long long int data types.

Grammar:

<code>result = a % b;</code>

Among them:

• ##a: dividend
• b: Divisor
• result: Remainder

Usage example:

// 求25除以5的余数
int result = 25 % 5;

// result的值为0，因为25除以5没有余数

// 求100除以13的余数
result = 100 % 13;

// result的值为4，因为100除以13的余数为4

Precautions for use :

The divisor cannot be 0, otherwise a mathematical error will occur.
• The remainder has the same sign as the dividend.
• The percent sign operator has a higher priority, usually higher than the addition, subtraction, multiplication and division operators.
• The percent sign operator can be used in various scenarios, such as:
  • Finding the remainder: Calculate the remainder after dividing two integers.
  • Parity judgment: Judge the parity of a number by checking whether the result of the remainder of 2 is 0.
  • Base conversion: Convert a number from decimal to other bases by taking the remainder of the base multiple times.

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