Problem Solving: Detecting Letter Casing

In this lesson, we will learn to check if a letter is small or capital using functions.

Capital or small letter

Take a character input from the user and determine whether the character is a capital letter or a small letter.

Sample input

A

Sample output

Capital letter

Although we discussed this problem in the “Memory, Operations, and Control Structure” chapter. we will solve the same problem here using functions.

So let’s say we have a symbol variable as char input and we need to determine whether it is a capital or small letter. We will create a function charType() that takes symbol as a parameter and returns an integer based on whether the letter is small or capital. If it’s capital, our program will return 1; if it’s small, it’ll return 2; otherwise, it’ll return 3.