// Sample JS programs using loop implementations.

// while loop.

var i = 1;

while (i < 10) {

console.log("Iteration " + i);

i++;

}

// do-while loop.

var days = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"];

var i = 0;

do {

console.log( days[i++] );

} while (i < days.length);

// for loop.

for (var x = 1; x <= 9; x++) {

for (var y = 1; y <= 9; y++) {

console.log(x + " X " + y + " = " + (x * y));

}

}

// for-in loop.

var months = ["January", "February", "March", "April", "May", "June",

"July", "August", "September", "October", "November", "December"];

for (var idx in months) {

console.log("It's the month of " + months[idx] + "!");

}