> Aztec.nr API reference, v6.0.0 (mainnet and testnet). Index: https://docs.aztec.network/aztec-nr-api/v6.0.0/llms.txt

# Function point_from_x_coord_and_sign

Module: `noir_aztec::utils::point`

```rust
pub fn point_from_x_coord_and_sign(x: Field, sign: bool) -> Option<EmbeddedCurvePoint>
```

Returns an `EmbeddedCurvePoint` in the Grumpkin curve given its x coordinate and sign for the y coordinate.

Because not all values in the field are valid x coordinates of points in the curve (i.e. there is no corresponding y value in the field that satisfies the curve equation), it may not be possible to reconstruct a `Point`. `Option::none()` is returned in such cases.

@param x - The x coordinate of the point @param sign - The "sign" of the y coordinate - determines whether y <= (Fr.MODULUS - 1) / 2