Write program that print message if user enter shift

Answer 1

What language ?
if using Javascript, try this.

<p id="message"></p>

<script>
var message = document.querySelector('#message');
document.addEventListener("keyup", function(event) {
event.preventDefault();
if (event.keyCode === 16) {
message.innerHTML = "message";
}
});
</script>

Answer 2

in c++

Answer 3

could u be more clearer M Riaz
if a user enters the word "shift" as an input or hits the shift key ?

and what message should be printed?