Function ceil 

pub const fn ceil(x: f64) -> f64

🔬This is a nightly-only experimental API. (core_float_math #137578)

Experimental version of ceil in core. See f64::ceil for details.

Examples

#![feature(core_float_math)]

use core::f64;

let f = 3.01_f64;
let g = 4.0_f64;

assert_eq!(f64::math::ceil(f), 4.0);
assert_eq!(f64::math::ceil(g), 4.0);

This standalone function is for testing only. It will be stabilized as an inherent method.