Integers

Integer Literals

const decimal_int = 98222;
const hex_int = 0xff;
const another_hex_int = 0xFF;
const octal_int = 0o755;
const binary_int = 0b11110000;

Runtime Integer Values

Integer literals have no size limitation, and if any undefined behavior occurs, the compiler catches it.

However, once an integer value is no longer known at compile-time, it must have a known size, and is vulnerable to undefined behavior.

fn divide(a: i32, b: i32) i32 {
    return a / b;
}

In this function, values a and b are known only at runtime, and thus this division operation is vulnerable to both Integer Overflow and Division by Zero.

Operators such as + and - cause undefined behavior on integer overflow. Also available are operations such as +% and -% which are defined to have wrapping arithmetic on all targets.

Zig supports arbitrary bit-width integers, referenced by using an identifier of i or u followed by digits. For example, the identifier i7 refers to a signed 7-bit integer. The maximum allowed bit-width of an integer type is 65535.

See also:

• Wrapping Operations