class OfScientific (α : Type u) : Type u

• ofScientific : Nat → Bool → Nat → α

For decimal and scientific numbers (e.g., 1.23, 3.12e10). Examples:

• OfScientific.ofScientific 123 true 2 represents 1.23
• OfScientific.ofScientific 121 false 100 represents 121e100

def Float.ofBinaryScientific (m : Nat) (e : Int) : Float

Computes m * 2^e.

opaque Float.ofScientific (m : Nat) (s : Bool) (e : Nat) : Float

@[defaultInstance 501]

instance instOfScientificFloat : OfScientific Float

The OfScientific Float must have priority higher than mid since the default instance Neg Int has mid priority.

#check -42.0 -- must be Float

@[export lean_float_of_nat]

def Float.ofNat (n : Nat) : Float

def Float.ofInt : Int → Float

instance instOfNatFloat {n : Nat} : OfNat Float n

@[inline, reducible]

abbrev Nat.toFloat (n : Nat) : Float