[JAVASCRIPT][HackerRank]10 days of JS Day2

30 Dec 2019 in Algorithm

Day 2-1. arithmetic operators(산술연산자)

'use strict';

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.trim().split('\n').map(string => {
        return string.trim();
    });
    
    main();    
});

function readLine() {
    return inputString[currentLine++];
}

/**
*   Calculate the area of a rectangle.
*
*   length: The length of the rectangle.
*   width: The width of the rectangle.
*   
*	Return a number denoting the rectangle's area.
**/
function getArea(length, width) {
    let area;
    // Write your code here
    area = length * width;
    return area;
}

/**
*   Calculate the perimeter of a rectangle.
*	
*	length: The length of the rectangle.
*   width: The width of the rectangle.
*   
*	Return a number denoting the perimeter of a rectangle.
**/
function getPerimeter(length, width) {
    let perimeter;
    // Write your code here
    perimeter = 2 * (length + width);
    return perimeter;
}

Day2-2. loops

First, print each vowel in on a new line (in the same order as they appeared in ). Second, print each consonant (i.e., non-vowel) in on a new line (in the same order as they appeared in ).

sample output

javascriptloops

sample output

a
a
i
o
o
j
v
s
c
r
p
t
l
p
s

'use strict';

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.trim().split('\n').map(string => {
        return string.trim();
    });
    
    main();    
});

function readLine() {
    return inputString[currentLine++];
}

/*
 * Complete the vowelsAndConsonants function.
 * Print your output using 'console.log()'.
 */
function vowelsAndConsonants(s) {
    const vowel = ['a','e','i','o','u'];
    
    for(let i=0; i<s.length; i++){
        if(s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' || s[i]== 'u'){
            console.log(s[i]);
        }
    }
    for(let i=0; i<s.length; i++){
        
        if(s[i] == 'a' || s[i] == 'e' || s[i] == 'i' || s[i] == 'o' || s[i]== 'u'){  
        }else{
            console.log(s[i]);
        }
    }
}

Day 2-3. function

'use strict';

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.trim().split('\n').map(string => {
        return string.trim();
    });
    
    main();    
});

function readLine() {
    return inputString[currentLine++];
}
/*
 * Create the function factorial here
 */

function factorial(n){
    if(n === 0){
        return 1;
    } else{
        return n * factorial(n-1);
    }
}

function main() {
    const n = +(readLine());
    
    console.log(factorial(n));
}