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Zigzag Pattern in Python

def zigzag(n):

    for i in range(1, n + 1):

        if i % 2 == 1:              # odd rows: left to right

            print(" ".join(str(j) for j in range(1, n + 1)))

        else:                        # even rows: right to left

            print(" ".join(str(j) for j in range(n, 0, -1)))

zigzag(5)

Output:

1 2 3 4 5

5 4 3 2 1

1 2 3 4 5

5 4 3 2 1

1 2 3 4 5

Zigzag Star Pattern

n = 5

for i in range(n):

    print(" " * (n - i - 1) + "*" + " " * i)

Output:

    *

   * 

  *  

 *   

*    

Here is the short Python program to generate that exact pattern:

# The number of asterisks in each block

stars = "********"

# Print the top line

print("-" * 25)

# Print the shifting zigzag blocks

for i in range(9):

    if i < 5:

        # Top half: shifting left

        spaces = 12 - i

    else:

        # Bottom half: shifting right

        spaces = 4 + i

    print(" " * spaces + stars)

# Print the bottom line

print("-" * 25)

Output:

-------------------------

            ********

           ********

          ********

         ********

        ********

         ********

          ********

           ********

            ********

-------------------------

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