# Remove special characters from String str=input("Enter the String:")str2 = []i = 0while i < len(str):    ch = str[i]    if (ch>='a' and ch <= 'z') or  (ch >= 'A' and ch<= 'Z') or (ch >= '0' and ch <= '9') or (ch == '\0'):        str2.append(ch)    i += 1Final_String = ''.join(str2)print("After removing special character letter string is:",Final_String)