js function to print words on number
// actual conversion code starts here
var ones = ['', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine'];
var tens = ['', '', 'twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety'];
var teens = ['ten', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen'];
function convert_millions(num) {
if (num >= 1000000) {
return convert_millions(Math.floor(num / 1000000)) + " million " + convert_thousands(num % 1000000);
} else {
return convert_thousands(num);
}
}
function convert_thousands(num) {
if (num >= 1000) {
return convert_hundreds(Math.floor(num / 1000)) + " thousand " + convert_hundreds(num % 1000);
} else {
return convert_hundreds(num);
}
}
function convert_hundreds(num) {
if (num > 99) {
return ones[Math.floor(num / 100)] + " hundred " + convert_tens(num % 100);
} else {
return convert_tens(num);
}
}
function convert_tens(num) {
if (num < 10) return ones[num];
else if (num >= 10 && num < 20) return teens[num - 10];
else {
return tens[Math.floor(num / 10)] + " " + ones[num % 10];
}
}
function convert(num) {
if (num == 0) return "zero";
else return convert_millions(num);
}
//end of conversion code
//testing code begins here
function main() {
var cases = [0, 1, 2, 7, 10, 11, 12, 13, 15, 19, 20, 21, 25, 29, 30, 35, 50, 55, 69, 70, 99, 100, 101, 119, 510, 900, 1000, 5001, 5019, 5555, 10000, 11000, 100000, 199001, 1000000, 1111111, 190000009];
for (var i = 0; i < cases.length; i++) {
console.log(cases[i] + ": " + convert(cases[i]));
}
}
main();