printFibonacci.js

// first approach
function fibonacci(n) {
    a = 0;
    b = 1;
    while (a <= n) {
        console.log(a);
        c = a + b;
        a = b;
        b = c;
    }
}
fibonacci(100);
// second approach
var a = 0;
var b = 1;
var n = 30;

while (a <= n) {
    document.write(a + ", ");
    var c = a + b;
    a = b;
    b = c;
}