row = int(input('Enter number of row: '))
# Upper part of hollow diamond
for i in range(1, row+1):
for j in range(1,row-i+1):
print(" ", end="")
for j in range(1, 2*i):
if j==1 or j==2*i-1:
print("*", end="")
else:
print(" ", end="")
print()
# Lower part of hollow diamond
for i in range(row-1,0, -1):
for j in range(1,row-i+1):
print(" ", end="")
for j in range(1, 2*i):
if j==1 or j==2*i-1:
print("*", end="")
else:
print(" ", end="")
print()OUTPUT:–
Enter number of row: 8
*
* *
* *
* *
* *
* *
* *
* *
* *
* *
* *
* *
* *
* *
*