Default Parameter Values in TypeScript
Optional parameters can also be assigned a default value. In this case, the question mark to indicate that the parameter is optional is not written. As an example, let's assign the value 'snow' to those users who do not have a last name:
function func(first: string, last: string = 'snow') {
return first + ' ' + last;
}
Let's now use our function. Let's call it with two parameters:
func('john', 'smit'); // will return 'john smit'
Let's call it with one parameter:
func('john'); // will return 'john snow'
Create a function that will raise a number to a given power. Let the function take a number as its first parameter, and the power as its second. Let the second parameter be optional, and let the function raise the number to the second power by default.
