This Python program outputs a pattern in Hourglass shape on the screen. Two nested for loops are needed for this.
n = 8
for i in range(1, n):
for j in range(1, i):
print(' ', end='')
for k in range(i, n):
print("* ", end='')
print()
for i in range(n - 1, 0, -1):
for j in range(1, i):
print(' ', end='')
for k in range(i, n):
print("* ", end='')
print()
* * * * * * *
* * * * * *
* * * * *
* * * *
* * *
* *
*
*
* *
* * *
* * * *
* * * * *
* * * * * *
* * * * * * *