πŸ“

Is Even

Is Even
μž…λ¬Έ 기초 문법 +5pts

Problem

Write a function that returns true if a number is even, false otherwise.

Examples

Input: isEven(4)
Output: true
Input: isEven(7)
Output: false

Explanation

이 λ¬Έμ œλŠ” **λ‚˜λ¨Έμ§€ μ—°μ‚°μž(modulo operator)**와 **비ꡐ μ—°μ‚°μž**λ₯Ό ν™œμš©ν•˜μ—¬ 짝수λ₯Ό νŒλ³„ν•˜λŠ” 방법을 ν•™μŠ΅ν•©λ‹ˆλ‹€. **λ‚˜λ¨Έμ§€ μ—°μ‚°μž (%)** λ‚˜λ¨Έμ§€ μ—°μ‚°μžλŠ” μ™Όμͺ½ ν”Όμ—°μ‚°μžλ₯Ό 였λ₯Έμͺ½ ν”Όμ—°μ‚°μžλ‘œ λ‚˜λˆˆ λ‚˜λ¨Έμ§€λ₯Ό λ°˜ν™˜ν•©λ‹ˆλ‹€. 예λ₯Ό λ“€μ–΄ `7 % 2`λŠ” 1을 λ°˜ν™˜ν•©λ‹ˆλ‹€(7을 2둜 λ‚˜λˆ„λ©΄ λͺ«μ΄ 3이고 λ‚˜λ¨Έμ§€κ°€ 1). **μ§μˆ˜μ™€ ν™€μˆ˜μ˜ μ •μ˜** - 짝수: 2둜 λ‚˜λˆ„μ–΄ λ–¨μ–΄μ§€λŠ” 수 (λ‚˜λ¨Έμ§€κ°€ 0) - ν™€μˆ˜: 2둜 λ‚˜λˆ„μ–΄ λ–¨μ–΄μ§€μ§€ μ•ŠλŠ” 수 (λ‚˜λ¨Έμ§€κ°€ 1) **비ꡐ μ—°μ‚°μž (===)** `===`λŠ” μ—„κ²©ν•œ 동등 비ꡐ μ—°μ‚°μžλ‘œ,...

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Key Concepts

λ‚˜λ¨Έμ§€ μ—°μ‚°μž (%) 비ꡐ μ—°μ‚°μž (===) λΆˆλ¦¬μ–Έ λ°˜ν™˜ 짝수/ν™€μˆ˜ νŒλ³„
Time: O(1) Space: O(1)
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