Python

Say “Hello, World!” With Python

print("Hello, World!")

Python If-Else

if __name__ == '__main__':
    n = int(raw_input().strip())

    if n % 2 != 0:
        print("Weird")
    if n % 2 == 0 and (2 <= n <= 5):
        print("Not Weird")
    if n % 2 == 0 and (6 <= n <= 20):
        print("Weird")
    if n % 2 == 0 and n > 20:
        print("Not Weird")

Arithmetic Operators

if __name__ == '__main__':
    a = int(input())
    b = int(input())

    print(a + b)
    print(a - b)
    print(a * b)

Python: Division

if __name__ == '__main__':
    a = int(input())
    b = int(input())

    print(a // b)
    print(a / b)

Loops

if __name__ == '__main__':
    n = int(input())
    i = 0

    for num in range(n):
        print(num * num)

if __name__ == '__main__':
    n = int(input())
    
    for i in range(n):
        print(i+1, end="")

Write a function

def is_leap(year):
    leap = False
    
    if year % 400 == 0:
       leap = True
    elif year % 100 == 0:
        leap = False
    elif year % 4 == 0:
        leap = True
        
    return leap

Find a string

def count_substring(string, sub_string):
    count = 0
    
    for letter in range(len(string)):
        if string[letter:].startswith(sub_string):
            count += 1

    return count

if __name__ == '__main__':
    string = input().strip()
    sub_string = input().strip()
    
    count = count_substring(string, sub_string)
    print(count)

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