Condense arrays

JavaScript
1

Tell us what’s happening: why I am not getting output.

Your code so far

var array = [4,5,6,7,8];

// Only change code below this line.

var singleVal = array.reduce(function(previousVal, currentVal) {
  return previousVal - currentVal;
}, 0);


singleVal = array;

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36.

Link to the challenge:
https://www.freecodecamp.org/challenges/condense-arrays-with-reduce

2

That’s because you simply copy and pasted the code and didn’t read the instructions:

Use the reduce method to sum all the values in array and assign it to singleVal.

3

Now this code is working for me.

var array = [4,5,6,7,8];

// Only change code below this line.

var singleVal = array.reduce(function(previousVal, currentVal){
return previousVal+currentVal;
});

array = singleVal;

5

I was stuck i don’t Know why. That’s why i wrote it for help.