play audio on click javascript

<script>
function play() {
  var audio = new Audio('https://interactive-examples.mdn.mozilla.net/media/examples/t-rex-roar.mp3');
  audio.play();
}
</script>
<button onclick-"play();">PLAY MY AUDIO</button>

<audio id="audio" src="http://www.soundjay.com/button/beep-07.wav" autoplay="false" ></audio>
<a onclick="playSound();"> Play</a>
<script>
  function playSound() {
  var sound = document.getElementById("audio");
  sound.play();
}
</script>

<button onclick="playSound()">Play</button>

<script>
let playSound = () => new Audio("src.mp3").play();
</scirpt>

var audio = new Audio('audio_file.mp3');
audio.play();