JavaScript Statement: function
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In JavaScript,
the function statement declares
a function (akin to a subroutine or procedure in some other programming
languages), i.e. a set of statements that can be executed (which can return a result)
from elsewhere within the code.
EXAMPLE:
HTML USED IN THIS EXAMPLE:
<!DOCTYPE html>
<html> <!-- Copyright (c) Nematrian Limited 2018 -->
<head>
<style>
table,th,tr,td {border: 1px solid black; border-collapse: collapse;}
</style>
</head>
<body>
<table>
<tr>
<th>Example</th>
<th>Resulting values</th>
</tr>
<tr>
<td><code id="Example"></code></td>
<td><code id="Result"></code></td>
</tr>
</table>
<script>
function multiply(a, b) {
var c = a * b;
return c;
}
const arrowMultiply = (a, b) => { return a * b; }
const arrowMultiplySingleLine = (a, b) => a * b;
const arrowMultiplyBy2 = a => a * 2;
var x = multiply(3, 4);
var y = arrowMultiply(3, 4);
var z = arrowMultiplySingleLine(3, 4);
var q = arrowMultiplyBy2(3);
document.getElementById("Example").innerHTML =
'function multiply(a,b) {<br>' +
' var c = a * b;<br>' +
' return c;<br>' +
'}<br><br>' +
'const arrowMultiply = (a, b) => { return a * b; }<br>' +
'const arrowMultiplySingleLine = (a, b) => a * b;<br>' +
'const arrowMultiplyBy2 = a * 2;<br><br>' +
'var x = multiply(3,4);<br>' +
'var y = arrowMultiply(3,4);<br>' +
'var z = arrowMultiplySingleLine(3,4);<br>' +
'var q = arrowMultiplyBy2(3);<br>';
document.getElementById("Result").innerHTML = "x = " +
x + "<br>y = " + y + "<br>z = " + z + "<br>q = " + q;
</script>
</body>
</html>
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