Program to find largest among three numbers in C

Program to find the largest among three numbers in the C

In this program, we will discuss a simple concept of the program to find the largest number among three numbers in the C programming language.

In this topic, we are going to learn how to find the biggest number from given three numbers. we can use the operator in C language to find the biggest number of this program.

Using if statements to find the largest number

Among the integer numbers

Program 1  

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int num1, num2,num3; //declare the variables
    printf("Enter the first number to compare: ");
    scanf("%d",&num1);//get input from user for num1
    printf("Enter the second number to compare: ");
    scanf("%d",&num2);//get input from user for num2
    printf("Enter the third number to compare: ");
    scanf("%d",&num3);//get input from user for num3

    if(num1>=num2 && num1>=num3){
         printf("\nLargest number is: %d\n",num1);
    }//num1 compare with num 2 and num 3
    if(num2>=num1 && num2>=num3){
         printf("\nLargest number is: %d\n",num2);
    }//num2 compare with num1 and num3
    if(num3>=num1 && num3>=num2){
         printf("\nLargest number is: %d\n",num2);
    }//num3 compare with num1 and num2

   getch();
    return 0;
}

When the above code is compiled and executed, it produces the following results

Enter the first number to compare: 67
Enter the first number to compare: 98
Enter the first number to compare: 45

Largest number is: 98

Among the floating point numbers

Program 2

#include <stdio.h>
#include <stdlib.h>

int main()
{
    double num1, num2,num3; //declare the variables
    printf("Enter the first number to compare: ");
    scanf("%lf",&num1);//get input from user for num1
    printf("Enter the second number to compare: ");
    scanf("%lf",&num2);//get input from user for num2
    printf("Enter the third number to compare: ");
    scanf("%lf",&num3);//get input from user for num3

    if(num1>=num2 && num1>=num3){
         printf("\nLargest number is: %.2f\n",num1);
    }//num1 compare num 2 and num 3
    if(num2>=num1 && num2>=num3){
         printf("\nLargest number is: %.2f\n",num2);
    }//num2 compare num1 and num3
    if(num3>=num1 && num3>=num2){
         printf("\nLargest number is: %.2f\n",num2);
    }//num3 compare num1 and num2

   getch();
    return 0;
}

When the above code is compiled and executed, it produces the following results

Enter the first number to compare: 5.6
Enter the first number to compare: 8.1
Enter the first number to compare: 3.4

Largest number is: 8.10

Using Nested if-else statements for largest number

Program 3

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int num1,num2,num3; //declare the variables
    printf("Enter the first number to compare: ");
    scanf("%d",&num1);//get input from user for num1
    printf("Enter the second number to compare: ");
    scanf("%d",&num2);//get input from user for num2
    printf("Enter the third number to compare: ");
    scanf("%d",&num3);//get input from user for num3

    if(num1>=num2){//compare num1 and num2
            if(num1>=num3){//compare num1 and num3
         printf("\nLargest number is: %d\n",num1);
            }
            else{
                printf("\nLargest number is: %d\n",num3);
            }
    }
    else{
        if(num2>=num1){//compare num2 and num1
            printf("\nLargest number is: %d\n",num2);
        }
        else{
            printf("\nLargest number is: %d\n",num3);
        }

    }
   getch();
    return 0;
}

When the above code is compiled and executed, it produces the following results

Enter the first number to compare: 45
Enter the second number to compare: 87
Enter the third number to compare: 57

Largest number is: 87

Using Nested if statements for largest number

Program 4

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int num1, num2,num3; //declare the variables
    printf("Enter the first number to compare: ");
    scanf("%d",&num1);//get input from user for num1
    printf("Enter the second number to compare: ");
    scanf("%d",&num2);//get input from user for num2
    printf("Enter the third number to compare: ");
    scanf("%d",&num3);//get input from user for num3

    if(num1>=num2 && num1>=num3){
         printf("\nLargest number is: %d\n",num1);
    }//num1 compare num 2 and num 3
    else if(num2>=num1 && num2>=num3){
         printf("\nLargest number is: %d\n",num2);
    }//num2 compare num1 and num3
    else{
         printf("\nLargest number is: %d\n",num2);
    }

   getch();
    return 0;
}

When the above code is compiled and executed, it produces the following results

Enter the first number to compare: 56
Enter the second number to compare: 89
Enter the third number to compare: 65

Largest number is: 89

Suggested for you

If statements in C language

Nested if statements in C language

Operator in C language

Data type in C language

Variable in C language

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