# lt

Determine whether real-world value of one `fi` object is less than another

## Syntax

```c = lt(a,b) a < b ```

## Description

`c = lt(a,b)` is called for the syntax ```a < b``` when `a` or `b` is a `fi` object. `a` and `b` must have the same dimensions unless one is a scalar. A scalar can be compared with another object of any size.

`a < b` does an element-by-element comparison between `a` and `b` and returns a matrix of the same size with elements set to `1` where the relation is true, and `0` where the relation is false.

In relational operations comparing a floating-point value to a fixed-point value, the floating-point value is cast to the same word length and signedness as the `fi` object, with best-precision scaling.

## Examples

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Use the `lt` function to determine whether the real-world value of one `fi` object is less than another.

```a = fi(pi); b = fi(pi, 1, 32); a < b ```
```ans = logical 0 ```

Input `a` has a 16-bit word length, while input `b` has a 32-bit word length. The `lt` function returns `0` because after quantization, the value of `a` is greater than that of `b`.

When comparing a double to a `fi` object, the double is cast to the same word length and signedness of the `fi` object.

```a = fi(pi); b = pi; a < b ```
```ans = logical 0 ```

The `lt` function casts `b` to the same word length as `a`, and returns `0` because the two inputs have the same real-world value. This behavior allows relational operations to work between `fi` objects and floating-point constants without introducing floating-point values in generated code.