Pattern Printing Series: Alphabet Patterns Explained with Logic

Alphabet patterns are a classic way to improve your understanding of nested loops, ASCII values, and pattern logic in programming. Whether you’re preparing for an interview or just sharpening your logic, these patterns offer a fun and educational chall…


This content originally appeared on DEV Community and was authored by datatoinfinity

Alphabet patterns are a classic way to improve your understanding of nested loops, ASCII values, and pattern logic in programming. Whether you're preparing for an interview or just sharpening your logic, these patterns offer a fun and educational challenge. Let’s dive into some fascinating examples and decode the logic behind them!

Alphabet Pattern 1: 

A 
A B 
A B C 
A B C D 
A B C D E 

row=5
for i in range(1,row+1):
    for j in range(i):
        print(chr(j+65),end=" ")
    print()

Explanation:

  1. row=5 define how many rows and column needed.
  2. for i in range(1,row+1) control the number of rows.
  3. for j in range(i) control the number of column.
  4. chr(j+65) Converts j to its corresponding uppercase alphabet using ASCII. chr(65) = 'A', chr(66) = 'B', and so on.

Alphabet Pattern 2: 

A B C D E 
A B C D 
A B C 
A B 
A 

row=5
for i in range(row,0,-1):
    for j in range(i):
        print(chr(j+65),end=" ")
    print()

Explanation:

  1. row=5 define how many rows and column needed.
  2. for i in range(row,0,-1) control the number of rows.
  3. for j in range(i) control the number of column.
  4. chr(j+65) Converts j to its corresponding uppercase alphabet using ASCII. chr(65) = 'A', chr(66) = 'B', and so on.

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This content originally appeared on DEV Community and was authored by datatoinfinity


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