C program to convert string to lower case withotut using inbuilt functions

PROGRAM:

#include <stdio.h>
int main()
{
    char str[50];
    int i=0;
    printf("Enter a string to be converted to lowercase\n");
    scanf("%s",str);
    printf("Entered string is %s\n",str);
    while(str[i]!='\0')
    {
        if(str[i]>='A'&&str[i]<='Z')
        {
            str[i]=str[i]+32;
        }
        i++;
    }
    printf("String converted to lowercase: %s\n",str);
    return 0;
}

OUTPUT:

Enter a string to be converted to lowercase
INDIA.IS.GREAT
Entered string is INDIA.IS.GREAT
String converted to lowercase: india.is.great