# big

big(x)

Convert a number to a maximum precision representation (typically `BigInt` or `BigFloat`). See `BigFloat` for information about some pitfalls with floating-point numbers.

## Examples

1. Convert an integer to a `BigInt`:

``````julia> x = big(123456789)
123456789``````

The `big` function converts the integer `123456789` to a `BigInt` representation.

2. Convert a floating-point number to a `BigFloat`:

``````julia> y = big(3.14159)
3.14159``````

It converts the floating-point number `3.14159` to a `BigFloat`.

3. Ensure maximum precision for calculations:

``````julia> a = big(2.5)
2.500000000000000000000000000000000000000000000000000000000000000000000000000000

julia> b = big(0.1)
0.100000000000000005551115123125782702118158340454101562500000000000000000000000

julia> c = a + b
2.600000000000000177635683940025046467781066894531250000000000000000000000000000``````

This example demonstrates using `big` to achieve maximum precision when performing calculations involving floating-point numbers.

Common mistake example:

``````julia> z = big("Hello")
ERROR: MethodError: Cannot `convert` an object of type String to an object of type BigFloat``````

In this example, the `big` function is used with a non-numeric value. It's important to note that `big` is used for converting numbers to their maximum precision representation and not for arbitrary non-numeric types.