C Program to Find the Largest Number Among Three Numbers

Source Code 1

/* C program to find largest number using if statement only */

#include <stdio.h>
int main(){
      float a, b, c;
      printf("Enter three numbers: ");
      scanf("%f %f %f", &a, &b, &c);
      if(a>=b && a>=c)
         printf("Largest number = %.2f", a);
      if(b>=a && b>=c)
         printf("Largest number = %.2f", b);
      if(c>=a && c>=b)
         printf("Largest number = %.2f", c);
      return 0;
}

Source Code 2

/* C program to find largest number using if...else statement */

#include <stdio.h>
int main(){
      float a, b, c;
      printf("Enter three numbers: ");
      scanf("%f %f %f", &a, &b, &c);
      if (a>=b)
      {
          if(a>=c)
            printf("Largest number = %.2f",a);
          else
            printf("Largest number = %.2f",c);
      }
      else
      {
          if(b>=c)
            printf("Largest number = %.2f",b);
          else
            printf("Largest number = %.2f",c);
      }
      return 0;
}

Source Code 3

/* C Program to find largest number using nested if...else statement */

#include <stdio.h>
int main(){
      float a, b, c;
      printf("Enter three numbers: ");
      scanf("%f %f %f", &a, &b, &c);
      if(a>=b && a>=c)
         printf("Largest number = %.2f", a);
      else if(b>=a && b>=c)
         printf("Largest number = %.2f", b);
      else
         printf("Largest number = %.2f", c);
      return 0;
}

Though the technique to solve this problem is different in these three examples, output of all these program is same.

Enter three numbers: 12.2
13.452
10.193
Largest number = 13.45