# with_bigfloat_precision

with_bigfloat_precision(f::Function,precision::Integer)

Change the `BigFloat` arithmetic precision (in bits) for the duration of `f`. It is logically equivalent to:

``````old = get_bigfloat_precision()
set_bigfloat_precision(precision)
f()
set_bigfloat_precision(old)``````

## Examples

In the Julia programming language, the function `with_bigfloat_precision(f::Function, precision::Integer)` is used to change the precision of `BigFloat` arithmetic for the duration of a specific function `f`. The function works in the following way:

``````old = get_bigfloat_precision()
set_bigfloat_precision(precision)
f()
set_bigfloat_precision(old)``````

Now, let's provide some examples of how to use this function:

1. Perform calculations with increased precision:

``````julia> function calculate_pi()
with_bigfloat_precision() do
return 4 * atan(BigFloat(1))
end
end

julia> calculate_pi()
3.141592653589793238462643383279502884197169399375105820974944592307816406286198
``````

In this example, the `calculate_pi` function uses `with_bigfloat_precision` to temporarily increase the precision for the duration of the calculation. This allows for a more accurate approximation of π.

2. Perform matrix operations with higher precision:

``````julia> function matrix_multiplication(A, B)
with_bigfloat_precision() do
return A * B
end
end

julia> A = BigFloat[1.0 2.0; 3.0 4.0]
julia> B = BigFloat[5.0 6.0; 7.0 8.0]

julia> matrix_multiplication(A, B)
2×2 Array{BigFloat,2}:
19.0  22.0
43.0  50.0
``````

Here, the `matrix_multiplication` function uses `with_bigfloat_precision` to ensure that the multiplication of matrices `A` and `B` is performed with the desired precision.

Common mistake example:

``````julia> function calculate_sqrt(x)
result = 0
with_bigfloat_precision() do
result = sqrt(x)
end
return result
end``````

In this example, the `calculate_sqrt` function tries to use `with_bigfloat_precision` without specifying the desired precision. The precision argument is missing, which will result in an error. Always provide the desired precision as the second argument to `with_bigfloat_precision`.