EN

# JavaScript - Iterative Fibonacci sequence / number algorithm

13
points

Using __JavaScript__ it is possible to compute the Fibonacci sequence in the following way.

## Iterative algorithm example

```
// ONLINE-RUNNER:browser;
function calculateValue(number) {
if(number < 1) {
return 0;
}
var a = 0;
var b = 1;
for (var i = 1; i < number; ++i) {
var c = a + b;
a = b;
b = c;
}
return b;
}
// Example:
for (var n = 0; n < 10; ++n) {
console.log('f(' + n + ')=' + calculateValue(n));
}
```

Output:

```
f(0)=0
f(1)=1
f(2)=1
f(3)=2
f(4)=3
f(5)=5
f(6)=8
f(7)=13
f(8)=21
f(9)=34
```