Lambda expression:
- Writing a function in a short format.
- Function: become single line expression.
Anonymous functions:
- Anonymous – No name
- Function without name is called “Lambda expression”
Method example:
function increment(x)
{
x=x+1;
return x;
}
Lambda expression:
x => x+1Lambda expression with zero arguments:
() => {
document.write(“Hello”);
};
Lambda expression with input values:
(x, y) => {
document.write(x+y);
};
Lambda expression with return values:
(x, y) => {
return x+y;
};
Can be defined simply like:
(x,y) => x+y ;Program to define Arrow function to perform multiplication operation:
<html>
<body>
<h1> Lambda expression / Arrow Function </h1>
<p> Defining a function as an expression in single line </p>
<p> Name not required - function keyword not required </p>
<p> Return type not required </p>
<p id="res"> </p>
<script>
var multiply= (x, y) => x*y ;
document.getElementById("res").innerHTML = multiply(3,5);
</script>
</body>
</html>
Arrow function can be define in more than one statement using { }
<!doctype html>
<html>
<body>
<h1> Lambda expression / Arrow Function </h1>
<p> Defining a function as an expression in single line </p>
<p> Name not required - function keyword not required </p>
<p> Return type not required </p>
<p id="res"> </p>
<script>
var z = (x, y) => {
var sum = x*y ;
return sum
}
document.getElementById("res").innerHTML = z(5,5);
</script>
</body>
</html>