Constant MIN_EXP 

pub const MIN_EXP: i32 = f64::MIN_EXP; // -1_021i32

👎Deprecated since 1.99.0:

replaced by the MIN_EXP associated constant on f64

One greater than the minimum possible normal power of 2 exponent. Use f64::MIN_EXP instead.

Examples

// deprecated way
let min = std::f64::MIN_EXP;

// intended way
let min = f64::MIN_EXP;