A BB CCC DDDD pattern in Python

In this code, we are going to print A BB CCC DDD pattern in Python.

The ASCII table for A, B, C… and a, b, c…
A 65 a 97
B 66 b 98
C 67 c 99
and so on

The logic of the code is:

• The inner loop moves horizontally, whereas the outer loop moves vertically.
• The outer loop will iterate from i = 0 to i = n
• The inner loop will iterate from j = 0 to j = i + 1.
• The inner loop will print the character value of the ASCII code in every iteration.
• As soon as the inner loop finishes executing the cursor will move to the next line and the value of ASCII will increase by 1.

Code for uppercase character.

n = int(input("Enter number of rows: "))
ascii = 65
for i in range(n):
    for j in range(i + 1):
        a = chr(ascii)
        print(a, end = "")
    ascii = ascii + 1
    print("\n")

The output of the code is

Enter number of rows: 4
A
BB
CCC
DDDD

Enter number of rows: 7
A
BB
CCC
DDDD
EEEEE
FFFFFF
GGGGGGG

Code for lowercase character

n = int(input("Enter number of rows: "))
ascii = 97
for i in range(n):
    for j in range(i + 1):
        a = chr(ascii)
        print(a, end = "")
    ascii = ascii + 1
    print("\n")

The output of the code is

Enter number of rows: 5
a
bb
ccc
dddd
eeeee

Enter number of rows: 7
a
bb
ccc
dddd
eeeee
ffffff
ggggggg