Question

Declare all variables

1.Prompt the user for a letter

2.Scan/read the character from the keyboard

3.Change the letter to uppercase

4.Print both the original letter and uppercase letter onto the screen

Answer 1

#include <stdio.h>

int main() {
    char letter, upper;
    printf("Enter a letter: ");
    scanf(" %c", &letter);
    if(letter >= 'a' && letter <= 'z') {
        upper = (char) (letter - 32);
    }
    printf("Lowercase = %c and Uppercase = %c\n", letter, upper);
    return 0;
}