# Not all code paths return a value
**URL:** https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508
**Category:** Help
**Created:** [November 19, 2020, 8:54pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508 "2020-11-19T20:54:23Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@GameGod](https://forum.makecode.com/u/GameGod)
#### Post date: [November 19, 2020, 8:54pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508/1 "2020-11-19T20:54:23Z")
What is the error?
---
### Author:  [@UnsignedArduino](https://forum.makecode.com/u/UnsignedArduino)
#### Post date: [November 19, 2020, 9:11pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508/2 "2020-11-19T21:11:32Z")
Say we pass in `w` to `WhatToGet`.
Then it won’t execute `return`\*.
That’s a problem.
* * *
\*Well technically it will automatically return _something_ but IDK what it is in TypeScript. In Python, that would be `None` which is TypeScript’s `null`.
---
### Author:  [@GameGod](https://forum.makecode.com/u/GameGod)
#### Post date: [November 19, 2020, 9:20pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508/3 "2020-11-19T21:20:37Z")
So if I put an else, it will work?
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### Author:  [@UnsignedArduino](https://forum.makecode.com/u/UnsignedArduino)
#### Post date: [November 19, 2020, 9:25pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508/4 "2020-11-19T21:25:47Z")
You need to always return something no matter what happens in the function. And they have to be the same type.
So something like this:
```typescript
function foo(x: number): boolean {
if (x== 0) {
return true
}
}
```
Will give an error, because `x` can be 1, so it won’t execute `return true`.
Something like this:
```typescript
function foo(x: number): boolean {
if (x== 0) {
return true
} else {
return false
}
}
```
Will be syntactically correct. But notice how `true` and `false` are both `booleans`. You couldn’t do this:
```typescript
function foo(x: number): boolean {
if (x== 0) {
return true
} else {
return "bad value"
}
}
```
---
### Author:  [@GameGod](https://forum.makecode.com/u/GameGod)
#### Post date: [November 19, 2020, 9:29pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508/5 "2020-11-19T21:29:31Z")
But you could do
```
if (ReturedValue == 0) {
splash ("Bad Vaue")
}
```
Right?
---
### Author:  [@UnsignedArduino](https://forum.makecode.com/u/UnsignedArduino)
#### Post date: [November 19, 2020, 9:30pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508/6 "2020-11-19T21:30:11Z")
Are you in a function? You will still need to return a value.
---
### Author:  [@GameGod](https://forum.makecode.com/u/GameGod)
#### Post date: [November 19, 2020, 9:30pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508/7 "2020-11-19T21:30:28Z")
No, separate.
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### Author:  [@UnsignedArduino](https://forum.makecode.com/u/UnsignedArduino)
#### Post date: [November 19, 2020, 9:32pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508/8 "2020-11-19T21:32:00Z")
Yes, but you still have the problem with your original function.
---
### Author:  [@charliegregg](https://forum.makecode.com/u/charliegregg)
#### Post date: [November 19, 2020, 9:33pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508/9 "2020-11-19T21:33:01Z")
Yes If your function sometimes returns a value then It will get confused, If you use (if returned value == 0 then “bad value…”) that will be fine.
---
### Author:  [@charliegregg](https://forum.makecode.com/u/charliegregg)
#### Post date: [November 19, 2020, 9:33pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508/10 "2020-11-19T21:33:29Z")
But you always have to return or not return.
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### Author:  [@GameGod](https://forum.makecode.com/u/GameGod)
#### Post date: [November 19, 2020, 9:48pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508/11 "2020-11-19T21:48:12Z")
> [@UnsignedArduino](#):
>
> Yes, but you still have the problem with your original function.
Oh, I fixed that with the else statment.
---
### Author:  [@Dreadmask197](https://forum.makecode.com/u/Dreadmask197)
#### Post date: [November 20, 2020, 1:19pm UTC](https://forum.makecode.com/t/not-all-code-paths-return-a-value/4508/12 "2020-11-20T13:19:02Z")
At all times, you have to put return blocks at the end of a function if you have another return block at the end