Remove special character in an string

Problem to remove special character in a string.

Example-1:

Input    : S = "@my#crazy$coding*"
Output   : mycrazycoding  

Example-2:

Input    : S = "@$helloworld*!"
Output   : helloworld 

Solution

n = "@my#crazy$coding*"

d = ""

for i in range(len(n)):

    if(n[i].isalnum()):

        d += n[i]

print(d)

Output

mycrazycoding