Duration Literals

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In Zolo, unit suffixes attach directly to the number — no space, no special type. 5s compiles to 5000, 30min to 1_800_000, 1d to 86_400_000. The underlying type is i64 in milliseconds: there is no separate Duration type.

The available units are ns, us (or µs), ms, s, min, h, d, and w. Nanosecond and microsecond values that are less than 1ms round to zero.

Each suffix and its millisecond equivalent; floats (1.5h, 0.5s) are also valid.

01-duration-literals.zolo

Playground

// Feature: duration literals — unit suffixes on the number

// Syntax: `<n><unit>` — `unit ∈ {ns, us, ms, s, min, h, d, w}`

// When to use: timeouts, intervals, readable time expressions in

// the code. Internally they all become `i64` in milliseconds.


let nano = 0  // 500 nanoseconds -> rounds to ms

let micro = 0  // 100 microseconds -> 0ms

let milli = 250  // 250 milliseconds

let secs = 5000  // 5000ms

let mins = 1800000  // 1_800_000ms

let hours = 7200000  // 7_200_000ms

let days = 86400000  // 86_400_000ms


print(milli)

// expected: 250


print(secs)

// expected: 5000


print(mins)

// expected: 1800000


print(hours)

// expected: 7200000


print(days)

// expected: 86400000


// Floats also work — multiplier * factor + round.

let half = 500  // 500ms

print(half)

// expected: 500


let precise = 5400000  // 1.5 * 3_600_000 = 5_400_000ms

print(precise)
// expected: 5400000

Challenge

Create a variable week using the w suffix and another day with d. Confirm that week == day * 7 is true.