wap to change string upper case to lower case by using standard library function (strlwr) .

 

#include<stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

   char a[20];

   printf("enter your string in upper case :\n");

   gets(a);

   printf("your string is :");

   puts(a);

   

   strlwr(a);

   printf("string in lower case %s",a);

}

output :

enter your string in upper case : RAHUL your string is :RAHUL string in lower case rahul