I’m trying to use the `reduce()`

method in order to get the smallest common multiple of all the numbers in the `seq`

array, but for some reason, it keeps returning undefined. Anybody know what’s going on here?

```
function smallestCommons(arr) {
arr.sort((a,b)=>a-b)
let seq = []
for (let i=arr[0];i<=arr[1];i++) {
seq.push(i)
}
return seq.reduce((a,b) => {
(a*b)/gcd(a,b)
})
}
function gcd(a,b) {
if (b==0) {
return a
}
else {
return (b,a%b)
}
}
smallestCommons([1,5]);
```

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**Challenge:** Intermediate Algorithm Scripting - Smallest Common Multiple

**Link to the challenge:**