Example: Greatest of Three Numbers in C using If...else Ladder

#include <stdio.h>

​

// It's the main function of the program

int main()

{

    int num1, num2, num3;

​

    // Step-1 Enter three integer values

    printf("INPUT-1: ");

    scanf("%d", &num1);

​

    printf("INPUT-2: ");

    scanf("%d", &num2);

​

    printf("INPUT-3: ");

    scanf("%d", &num3);

​

    // Step-2 Check if num1 is greater than both num2 and num3, num1 is the greatest

    if (num1 >= num2 && num1 >= num3)

    {

        printf("\nGreatest Number :: %d", num1);

    }

​

    // Step-3 Check if num2 is greater than both num1 and num3, num2 is the greatest

    else if (num2 >= num1 && num2 >= num3)

    {

        printf("\nGreatest Number :: %d", num2);

    }

​

    // Step-4 If above both conditions are false then, num3 is the greatest

    else

    {

        printf("\nGreatest Number :: %d", num3);

    }

​

    return 0;

}