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v/examples/fibonacci.v
2019-10-24 10:25:47 +03:00

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V

// This program displays the fibonacci sequence
import os
fn main() {
// Check for user input
if os.args.len != 2 {
println('usage: fibonacci [rank]')
// Exit
return
}
// Parse first argument and cast it to int
stop := os.args[1].int()
// Three consecutive terms of the sequence
mut a := i64(0)
mut b := i64(0)
mut c := i64(1)
for i := 0; i < stop; i++ {
// Set a and b to the next term
a = b
b = c
// Compute the new term
c = a + b
// Print the new term
println(c)
}
}