Hello!

I am trying to solve this task using well known techniques. I outlined a plan (express necessary actions on paper), wrote a pseudo code. Then I implemented it step by step. First I made the code to calculate GCD only. Then LCM. Now that I try to combine the two, I ran into troubles which are more syntax related I think.

So this code calculates LCM for first two numbers, then second and third numbers, then third and fourth, etc.

```
function smallestCommons(arr) {
//creating an array with two given numbers as start and end points
let newArr=[]
if (arr[0]<arr[1]){
for (let i = arr[0]; i<=arr[1];i++){
newArr.unshift(i)
}
} else if (arr[0]>arr[1]){
for (let j=arr[0]; j>=arr[1];j--){
newArr.push(j)
}
}
console.log(newArr)
for (let x=0;x+1<newArr.length;x++){
//gcd calculation
let a=newArr[x]
let b=Math.floor(newArr[x]/newArr[x+1])
let r=newArr[x]%newArr[x+1]
let q=Math.round(newArr[x]/newArr[x+1])
do {
a=b*q+r
a=b
b=r
q=Math.round(a/b)
r=a%b
} while (r>0)
//lcm calculation
let lcm = (newArr[x]* newArr[x+1])/q
}
}
```

What I need is to calculate LCM from first two numbers, then calcualte LCM from the first LCM and the third number, then calculate LCM from second LCM and fourth number, etc.

In my opinion, it should work if I fix **a** to **lcm**, but it does not. What am I missing?

```
function smallestCommons(arr) {
//creating an array with two given numbers as start and end points
let newArr=[]
if (arr[0]<arr[1]){
for (let i = arr[0]; i<=arr[1];i++){
newArr.unshift(i)
}
} else if (arr[0]>arr[1]){
for (let j=arr[0]; j>=arr[1];j--){
newArr.push(j)
}
}
for (let x=0;x<newArr.length;x++){
//gcd calculation
let a=newArr[0]
let b=Math.floor(a/newArr[x])
let r=a%newArr[x]
let q=Math.round(a/newArr[x])
do {
a=b*q+r
a=b
b=r
q=Math.round(a/b)
r=a%b
} while (r>0)
//lcm calculation
let lcm = (a*newArr[x])/q
console.log(lcm)
a = lcm
return lcm
}
}
```

I hope at least I get the math right.