JavaScript - Iterative Fibonacci sequence / number algorithm

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