Elements of programming -5.

Nested if statement.

First a condition is checked if it is true then another condition checked. If it is true another condition is checked. If it also true then a block of statement is executed. If the first condition is true, then else part will be executed. we can also check another condition in else part.

Example.

We are going to find big number among three numbers. The program for it.

#include <stdio.h> 

int main()

{

     int a,b,c;

     printf("enter a:");

     scanf("%d",&a);

     printf("enter b");

     scanf("%d",&b);

     printf("enter c");

     scanf("%d",&c);

     if(a>b)

     {

         if(a>c)

         {

             printf("a is big");

         }

         else

         {

             printf("c is big");

         }

     }

     else

     {

         if(b>c)

         {

             printf("b is big");

         }

         else

         {

             printf("c is big");

         }

     }

    return 0;

}

In the above program has been written in c language. It uses the method of nested if statement.  First a is greater than b is executed if it is true then it check for the second condition whether the second condition is true or not false. If it also true a is declared as big number. If the second condition is false then c is declared as big number .if the first condition is false then it comes to else part.  It also checks another condition. If it is true then b is declared as big number. If it is false then c is declared as big number.

                    Will continue

                                                                                Muthu karthikeyan,Madurai.

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