The document provides instructions for writing C++ code to print specific patterns using loops. It outlines three distinct patterns: a sequence of letters, a sequence of numbers, and a sequence involving both 1s and 2s. Each pattern requires either a for or while loop to achieve the desired output.

1. Write a C++ code to print the following pattern: use either for or while loop only
(a)
F
G G
H H H
I I I I
J J J J
b)
5 6 7 8 9
5 6 7 8
5 6 7
5 6
5
c)
1
2 1
1 2 1
2 1 2 1
1 2 1 2 1