Java

• Write the following char functions without using Javas String class or any other built-in methods/classes
• Assume c is a char inputted by a user

1. isLetter(c) if c is an English letter (A-Z or a-z), then set the variable isLetter to true; otherwise, set isLetter to false.

2. isDigit(c) if c is a digit, then set the variable isDigit to true; otherwise, set isDigit to false.

1. Using a loop, print each character of the uppercase English alphabet (A through Z).

2. Using a loop, print each character of the uppercase English alphabet backwards (Z through A).

3. Using a nested loop (one loop nested inside of another loop), print the uppercase English alphabet (A through Z) n times, where n > 0 is an integer inputted by a user. You may assume the user will input a valid integer for n.

For example, if a user inputs 5 for n, your program should print the following:

ABCDEFGHIJKLMNOPQRSTUVWXYZ

ABCDEFGHIJKLMNOPQRSTUVWXYZ

ABCDEFGHIJKLMNOPQRSTUVWXYZ

ABCDEFGHIJKLMNOPQRSTUVWXYZ

ABCDEFGHIJKLMNOPQRSTUVWXYZ