Logic Building/Phase 5 - Category 2: Character Operations/Program

Count Special Characters

Count special characters in string.

Logic BuildingIntermediate

Logic Building

# Take string input
s = input("Enter a string: ")

# Count special characters
count = 0
for char in s:
    if not char.isalnum() and not char.isspace():
        count += 1

print(f"Special characters: {count}")

Output

Enter a string: Hello@World!
Special characters: 2

Count characters that are not alphanumeric or space.

Key Concepts:

isalnum() checks alphanumeric
isspace() checks space
Count if neither

Count Digits in String

Toggle Case