Marusya's School Notes

The () Operator Invokes the Function

On the previous webpage, the toCelsius refers to the function object, and toCelsius() (with parentheses) refers to the function result. Accessing a function without () will return the function definition:

HTML file:	Displayed by browser:
<body> <p>Accessing a function without (), will return the function definition:<p id="demo"></p> <script> function toCelsius(f) { return (5/9) * (f-32); } document.getElementById("demo").innerHTML = toCelsius; </script> </body>	Accessing a function without (), will return the function definition:

HTML file:

Displayed by browser:

<body>
<p>Accessing a function without (), will return the function definition:<p id="demo"></p>
<script>
function toCelsius(f) {
return (5/9) * (f-32);
}
document.getElementById("demo").innerHTML = toCelsius;
</script>
</body>

Accessing a function without (), will return the function definition: