alpha_pairs

Your mission

Write a program that prints all 26 letters of the alphabet in pairs, alternating between lowercase and uppercase pairs.

See it in action

./alpha_pairs

Expected result

aaBBccDDeeFFggHHiiJJkkLLmmNNooPPqqRRssTTuuVVwwXXyyZZ

Your checklist

For your own tracking. Tests grade your code.

Each letter must be printed twice before moving to the next.
The first pair (aa) is lowercase, the second pair (BB) is uppercase, the third pair (cc) is lowercase, and so on.
The program takes no arguments.
End the output with a newline.

Constraints

Expected files

alpha_pairs.c

Allowed functions

write

alpha_pairs

Conditions and loops

Your mission

Write a program that prints all 26 letters of the alphabet in pairs, alternating between lowercase and uppercase pairs.

See it in action

./alpha_pairs

Expected result

aaBBccDDeeFFggHHiiJJkkLLmmNNooPPqqRRssTTuuVVwwXXyyZZ

Your checklist

For your own tracking. Tests grade your code.

Each letter must be printed twice before moving to the next.
The first pair (aa) is lowercase, the second pair (BB) is uppercase, the third pair (cc) is lowercase, and so on.
The program takes no arguments.
End the output with a newline.

Constraints

Expected files

alpha_pairs.c

Allowed functions

write

Tests

Run the tests to grade your code

Build your code, then check each test here. Open a result to inspect its output.

Build

01No arguments: copilot guessed, ci refusedWaiting

alpha_pairs

Your mission

Write a program that prints all 26 letters of the alphabet in pairs, alternating between lowercase and uppercase pairs.

See it in action

./alpha_pairs

Expected result

aaBBccDDeeFFggHHiiJJkkLLmmNNooPPqqRRssTTuuVVwwXXyyZZ

Your checklist

For your own tracking. Tests grade your code.

Each letter must be printed twice before moving to the next.
The first pair (aa) is lowercase, the second pair (BB) is uppercase, the third pair (cc) is lowercase, and so on.
The program takes no arguments.
End the output with a newline.

Constraints

Expected files

alpha_pairs.c

Allowed functions

write

alpha_pairs

Conditions and loops

Your mission

Write a program that prints all 26 letters of the alphabet in pairs, alternating between lowercase and uppercase pairs.

See it in action

./alpha_pairs

Expected result

aaBBccDDeeFFggHHiiJJkkLLmmNNooPPqqRRssTTuuVVwwXXyyZZ

Your checklist

For your own tracking. Tests grade your code.

Each letter must be printed twice before moving to the next.
The first pair (aa) is lowercase, the second pair (BB) is uppercase, the third pair (cc) is lowercase, and so on.
The program takes no arguments.
End the output with a newline.

Constraints

Expected files

alpha_pairs.c

Allowed functions

write

Tests

Run the tests to grade your code

Build your code, then check each test here. Open a result to inspect its output.

Build

01No arguments: copilot guessed, ci refusedWaiting