If statement is the part of JavaScript. If statement executes a statement when the condition is true.
Syntax:
if (condition) {
// block of code to be executed if the condition is true
}
Example:
<script type="text/javascript">
var input = Number(prompt("Please enter a number", ""));
if (input == 1) {
alert("You have entered one");
}
if (input == 2) {
alert("You have entered Two");
}
if (input == 3) {
alert("Your have entered Three");
}
if (input != 1 && input != 2 && input !=3) {
alert("Your have to enter number between 1 and 3");
}
</script>
Output:
