Hi, I'm trying to solve a Playground exercise on the [Cairo website](https://www.cairo-lang.org/playground/) named "Conditionals". I don't know how to make OR operator in Cairo. I tried something like that:

```
func abs_eq(x: felt, y: felt) -> (bit: felt) {
    if (x == -y) or (x == y) {
        return (bit=1);
    } else {
        return (bit=0);
    }
}
```

but it gives me an error


`Error: code:12:18: Unexpected token Token('IDENTIFIER', 'or'). Expected: "{".
    if (x == -y) or (x == y) {`

How can I solve it?


Cairo OR operator

I'm new to Cairo and I want to know what is the difference when I write `let x = 1;` and `tempvar x = 1;`. Is there any difference in Cairo Lang between let and tempvar?

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