python_if문, for문, def문, naming규칙, range

if문

import math
import os
import random
import re
import sys


if __name__ == '__main__':
    n = int(input().strip())
    if n % 2 ==1 :
        print('Weird')
    elif n<=5 and n%2==0 :
        print('Not Weird')
    elif n<=20 and n%2==0 :
        print('Weird')
    else :
        print('Not Weird')

loop 반복문 , range

if __name__ == '__main__':
    n = int(input())
    for x in range(n) :
        print(x**2)

 

TMI. naming 스타일은 2가지 종류가 있죵

• Camel 카멜 = 자바에서 주로 쓰임 (예시 : helloWorld)
• Snake 스네이크 = 파이썬에서 주로 쓰임 (예시 : hello_world)

 

함수 정의

def is_leap(year):
    leap = False
    not_leap_list = [1800, 1900, 2100, 2200, 2300, 2500 ]
    # Write your logic here
    if year%4 ==0 and year>=1900 and year <=10**5 and year not in not_leap_list :
        leap = True
    return leap

year = int(input())
print(is_leap(year))

 

javascript 프론트엔드

 

a//b= 나누기 한 몫의 정수

a/b = 나누기 한 몫의 실수

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

print(i, end="")

range

for

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

range(start, stop)
range(1, 11)
>>1, 2, 3, 4, 5, 6, 7, 8, 9, 10 

range(start, stop, step)
range(0, 20, 2)
>> 0, 2, 4, 6, 8, 10, 12, 14, 16, 18

range(20, 0, -2)  #step은 음수 지정 가능
>> 20, 18, 16, 14, 12, 10, 8, 6, 4, 2

 

range, list comprehension -> 어려움 외워!!

if __name__ == '__main__':
    x = int(input())
    y = int(input())
    z = int(input())
    n = int(input())

    arr = [[a,b,c]  for a in range(x+1) 
                    for b in range(y+1) 
                    for c in range(z+1) 
                    if a + b + c != n ]
    
    print(arr)

Sample Input

1
1
1
2

Sample Output

[[0, 0, 0], [0, 0, 1], [0, 1, 0], [1, 0, 0], [1, 1, 1]]