Array Properties And Methods Challenge

Question

Can someone please help me with this challenge. Test case 4 and 5 work but 1,2 and 3 do not.

The player receives points after passing each level of a game.
The program given takes the number of passed levels as input, followed by the points gained for each level, and creates the corresponding array of points.
Complete the program to calculate and output to the console the sum of all gained points.

Sample Input
3
1
4
8

Sample Output
13

function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;
}

var sum = 0 + points.length + elem + count;
//calculate the sum of points

//output
console.log(sum);
}

Answer 1

What's readLine()?

No need to add points.length and count, only add elements of the array.

Answer 2

Hi
This is my programming and it worked very well
function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;

}

var sum = points[0];
//calculate the sum of points
for (i=1;i< points.length ;i++){
sum = sum + points[i];
}

//output
console.log(sum);
}

Answer 3

Update on the problem.

I managed to get all test cases to work, thank you to everyone who commented...

here is the solution.

function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;
}

var sum = points.reduce(function(a, b) {
return a + b;
}, 0);
//calculate the sum of points

//output
console.log(sum);
}

Answer 4

Gordon
readline() is reading stdin in Node.js

Answer 5

This worked for me
function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;
}

var sum = 0;
//calculate the sum of points
for(i = 0; i < points.length; i++){
sum = sum + points[i];
}
console.log(sum);

}

Answer 6

What does .reduce mean? We haven't had a lesson on that, yet it is used in the sample solution.

Answer 7

var sum = points[0];
//calculate the sum of points
for(i=1; i<points.length; i++){
sum += points[i];
}
//output
console.log(sum);

Answer 8

function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;
}
//calculate the sum of points

var sum = 0;
for(let i=0;i<points.length;i++)
sum+=points[i];
//output
console.log(sum);
}

Answer 9

function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;
}
var sum =0;
for (i=0;i< points.length ;i++){
sum = sum + points[i];
}

console.log(sum);
}

Answer 10

Here is the correct code

function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;
}

var sum = points.reduce(function(a, b) {
return a + b;
}, 0);
//output
console.log(sum);
}

Answer 11

Gordon, readLine is the input that will be used to test your code.

So how would I do that if the numbers are changing for each case?

Answer 12

Challenge Declined!

Answer 13

function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
var sum = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
//calculate the sum of points
sum += points[count];
count++;
}

//output
console.log(sum);
}

Answer 14

function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;
}
if (count == 4 )
{
var sum = points[0] + points[1] + points[2] + points[3];
}
if (count == 2 )
{
var sum = points[0] + points [1];
}
if (count == 3)
{
var sum = points[0] + points[1] + points[2];
}
if (count == 5 )
{
var sum = points[0] + points[1] + points[2] + points[3] + points[4];
}
//calculate the sum of points

//output
console.log(sum);
}

Answer 15

function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
var sum = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
sum = elem + sum
count++;
}

//output
console.log(sum);
}

Answer 16

function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;
}

var sum = 0;
//calculate the sum of points
for (i=0;i< points.length ;i++){
sum = sum + points[i]
}

//output
console.log(sum);
}

Answer 17

function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;
}

var sum = points.reduce(function(a, b) {
return a + b;
}, 0);
//calculate the sum of points

//output
console.log(sum);
}

Good Luck

Answer 18

The answer is.
please copy the whole code and paste it
function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;

}

var sum = points[0];
//calculate the sum of points
for (i=1;i< points.length ;i++){
sum = sum + points[i];
}

//output
console.log(sum);
}

Answer 19

function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;
}

var sum = points[0];
//calculate the sum of points
for (i=1;i< points.length ;i++){
sum += points[i];
}
//output
console.log(sum);
}

Answer 20

function main() {
//take the number of passed levels
var levels = parseInt(readLine(),10);
var points = new Array();

var count = 0;
while(count<levels){
var elem = parseInt(readLine(),10);
points[count] = elem;
count++;
}

var sum = 0;
//calculate the sum of points
for(x = 0; x < points.length; x++){
sum += points[x];
}
//output
console.log(sum);
}