02 · Primitives & Numbers
Integers & Floats
int and float, arithmetic, and int → float coercion.
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int and float are the two core numeric types. Integer division promotes to
float; the reverse needs an explicit call via std::math. Float literals
accept scientific notation (1.5e3):
Decimal literals, the arithmetic operators, and int → float coercion.
02-numbers-int-float.zolo
// Feature: Numbers — `int` and `float`
// Syntax: decimal literals; `.` introduces a float
// When to use: arithmetic. `int` and `float` are distinct static types;
// use an explicit cast when a mixed operation should produce a float.
use std::math
// Integers — no decimal point.
let a: int = 42
let b: int = -17
// Floats — with a dot OR scientific notation.
let c: float = 3.14
let d: float = 1.5e3 // 1500.0
let e: float = 2.5e-2 // 0.025
// Operations: + - * / % ** (power)
print(a + b) // 25
print(c * 2.0) // 6.28
print(a / 5) // 8.4 (division promotes to float)
print(a % 5) // 2
print(2 ** 10) // 1024
// Mixed arithmetic uses an explicit conversion.
let f = (a as float) + c // f: float = 45.14
print(f)
// Explicit conversion via stdlib.
let g = math.floor(3.9) // 3
let h = math.round(3.5) // 4
print(g, h)
See also