Chapter 10, Problem 33RQE

Explanation of Solution

“isupper” function:

The function isupper() is used to test whether a character is an uppercase letter or not.

• $\text{isupper('A')}$ - Returns as true
  • Character ‘A’ is an uppercase letter
• $\text{isupper('a')}$ - Returns as false
  • Character ‘a’ is not an uppercase letter

Example:

Consider the example of “isupper” is as follows:

//declare and initialize t