1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
#!/usr/bin/env p2sh
let fibonacci = fn(n) {
if n == 0 {
return 0;
} else if n == 1 {
return 1;
}
let a = 0;
let b = 1;
let result = 0;
let i = 2;
while i <= n {
result = a + b;
a = b;
b = result;
i = i + 1;
}
return result;
}
let n = if len(argv) > 1 {
int(argv[1])
} else {
30
};
let t1 = time();
let fib = fibonacci(n);
let t2 = time();
let secs = t2 - t1;
println("fib({}) = {} [took {} secs] ", n, fib, secs);