Diamond pattern in python using while loop

Harshad Koshti

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Feb 28, 2021

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n = int(input("Enter n:"))
m = (n+1)/2

i = 1
while i<=n:
    if i<m:
        b = m-i
        s = 2*i-1
    else:
        b = i - m
        s = 2*(n-i) + 1
    j = 1
    while j<=b:
        print(" ",end="")
        j += 1
    j = 1
    while j<=s:
        print("*",end="")
        j +=1
    print()
    i += 1Output:
n = 11     *
    ***
   *****
  *******
 *********
***********
 *********
  *******
   *****
    ***
     *
logic : 
For upper triangle : blank space = m - i
                     star : 2*i - 1
For lower triangle: blank space: i -m
                     star : 2*(n-i) -1