Differentiate the modulo and division by using C Programming language?

In C programming, the modulo and division operators are fundamental arithmetic operators that work with integers but produce different results from the same operands.

Modulo (%) − Returns the remainder after integer division.

Division (/) − Returns the quotient (whole number result) of integer division.

Syntax

result = dividend % divisor;  // Modulo operation
result = dividend / divisor;  // Division operation

Example 1: Basic Modulo and Division

This example demonstrates the difference between modulo and division operators −

#include <stdio.h>

int main() {
    int a, b;
    printf("Enter two numbers: ");
    scanf("%d %d", &a, &b);
    
    printf("a/b = %d (quotient)<br>", a/b);
    printf("a%%b = %d (remainder)<br>", a%b);
    printf("(a+10)/b = %d<br>", (a+10)/b);
    printf("(a+10)%%b = %d<br>", (a+10)%b);
    
    return 0;
}

Enter two numbers: 17 5
a/b = 3 (quotient)
a%b = 2 (remainder)
(a+10)/b = 5
(a+10)%b = 2

Example 2: Using Pointers for Modulo and Division

This example shows how to perform modulo and division operations using pointer variables −

#include <stdio.h>

int main() {
    int num1, num2;
    int *p1, *p2;
    int div, mod;
    
    /* Assigning addresses to pointers */
    p1 = &num1;
    p2 = &num2;
    
    printf("Enter two numbers: ");
    scanf("%d %d", &num1, &num2);
    
    /* Performing operations using pointers */
    div = *p1 / *p2;
    mod = *p1 % *p2;
    
    printf("Division result = %d<br>", div);
    printf("Modulo result = %d<br>", mod);
    
    return 0;
}

Enter two numbers: 30 7
Division result = 4
Modulo result = 2

Key Differences

Conclusion

The division operator (/) gives the quotient of integer division, while the modulo operator (%) gives the remainder. Both operators are essential for mathematical computations and algorithmic problem-solving in C programming.