数字类型

Sized Number

The default integer type is Integer, short alias is int.

It is a reference type, which represents an arbitrary precision integer.

If you want some fixed size number, you can write 255u8

Here are some other primitive numeric type

postfix	description	example
`u8`	unsigned 8 bit integer	`255u8`
`i8`	signed 8 bit integer	`-127i8`
`u16`	unsigned 16 bit integer	`65535u16`
`i16`	signed 16 bit integer	`-32767i16`
`b16`	truncated 32-bit float	`0.5f16`
`u32`	unsigned 32 bit integer	`4294967295u32`
`i32`	signed 32 bit integer	`-2147483647i32`
`f32`	single precision float	`0.5f32`
`u64`	unsigned 64 bit integer	`18446744073709551615u64`
`i64`	signed 64 bit integer	`-9223372036854775807i64`
`f64`	double precision float	`0.5f64`
`u128`	unsigned 128 bit integer	`340282366920938463463374607431768211455u128`
`i128`	signed 128 bit integer	`-170141183460469231731687303715884105727i128`
`d128`	128 bit decimal	`0.5d128`

Unit number

In addition, you can customize other postfix number types

1m + 2cm
1kg * 9.8`m/s^2`