upper_to_lowerCase

#include<stdio.h>

int main(){
    char ch;
    printf("Enter any character in upper case: ");
    scanf("%c", &ch);
    if((ch<65)||(ch>90)){
        printf("Please enter valid upper case alphabet only!");
    }
    else{
        printf("%c in lower case is: %c", ch, ch+32);
    }
    return 0;
}