C program to convert string to uppercase without using inbuilt functions

PROGRAM:

#include <stdio.h>
int main()
{
    char str[50];
    int i=0;
    printf("Enter a string to be converted to uppercase\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 uppercase: %s\n",str);
    return 0;
}

OUTPUT:

Enter a string to be converted to uppercase
Work.is.Worship
Entered string is Work.is.Worship
String converted to uppercase: WORK.IS.WORSHIP