C PROGRAM 

C program to print UPPER CASE  into lower case

#include <stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

    char str[25],i;

    printf("Enter the string\n");

    scanf("%s",&str);

    for(i=0; i<=strlen(str); i++)

    {

        if(str[i]>=65&&str[i]<=90)

            str[i]=str[i]+32;

    }

    printf("lower case string is:%s",str);

    return 0;

}

OUTPUT:

enter the string

MANIKANDAN

lower case string is:manikandan

[Process completed (code 33) - press Enter]