Program to Find the Greatest of Two Numbers in C

Finding the Greatest of Two Numbers

Given two integer inputs num1 and num2, the objective is to determine which number is greater using C programming.

We will explore different methods to achieve this.

Method 1: Using if-else Statement

We use an if-else statement to compare two numbers and determine the greatest one.

#include <stdio.h>

int main() {
    int num1, num2;
    printf("Enter two numbers: ");
    scanf("%d %d", &num1, &num2);
    
    if (num1 > num2) {
        printf("%d is the greatest number", num1);
    } else if (num2 > num1) {
        printf("%d is the greatest number", num2);
    } else {
        printf("Both numbers are equal");
    }
    return 0;
}
            

Output:

Enter two numbers: 5 10
10 is the greatest number

Method 2: Using Ternary Operator

We use the ternary operator ?: to find the greatest number in a single line.

#include <stdio.h>

int main() {
    int num1, num2;
    printf("Enter two numbers: ");
    scanf("%d %d", &num1, &num2);
    
    int greatest = (num1 > num2) ? num1 : num2;
    printf("%d is the greatest number", greatest);
    
    return 0;
}
            

Output:

Enter two numbers: 7 3
7 is the greatest number

Method 3: Using Function

We create a function to compare two numbers and return the greatest one.

#include <stdio.h>

int findGreatest(int a, int b) {
    return (a > b) ? a : b;
}

int main() {
    int num1, num2;
    printf("Enter two numbers: ");
    scanf("%d %d", &num1, &num2);
    
    printf("%d is the greatest number", findGreatest(num1, num2));
    
    return 0;
}
            

Output:

Enter two numbers: 4 9
9 is the greatest number