As as

Casts a value to a specified type.

> (as 'i64 1.5)
1
> (as 'f64 1)
1.0
> (as 'I64 [1.2 3 4])
[1 3 4]
> (as 'f64 [1 2 3])
[1.0 2.0 3.0]
(as 'String 1)
"1"
> (as 'String [1 2 3])
"[1 2 3]"