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Module DEMO-32-90DEMO-C-32

Uppercase Converter

DEMO-C-32 • Programming in C

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Problem Statement

Write a function char toUpper(char c) that converts a lowercase letter to uppercase.

If it's already uppercase or not a letter, return it unchanged.

Constraints

Standard ASCII.

Input Format

A single character.

Output Format

Ideally uppercase character.

Sample Testcases

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Sample #1
Public sample
Input
a
Output
A
Explanation
a -> A.
Sample #2
Public sample
Input
A
Output
A
Explanation
A unchanged.
Sample #3
Public sample
Input
1
Output
1
Explanation
Digit unchanged.
Sample #4
Public sample
Input
!
Output
!
Explanation
Symbol unchanged.

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