Data Types: Float and Float32

fn main() {
    const pi = 3.14159
    const half: Float32 = 0.5
    print(pi)
    print(half)
    print(7.0 / 2.0)
    print(1e9)
}

3.141590.53.51000000000.0

A Float always prints with a point or an exponent (1000000000.0), so you can tell it from an Int. Floats are stored in binary, so most decimals are kept a tiny bit off; for money, use Decimal.

Its 64 bits

Binary formats store a Float as its 64 bits in IEEE 754 form. x.bits() gives them as a UInt64, and Float.from_bits(n) turns them back into the same Float:

fn main() {
    const x = 1.5
    const bits = x.bits()
    print(bits)
    print(Float.from_bits(bits))
    print(Float.from_bits(bits).bits() == bits)
}

46094342186137026561.5true