523072830 by Unknown

Author:Unknown
Language: eng
Format: epub

We can add labels to the parameters, which make the arguments more readable. You will notice that the preceding function is much more readable when we use the label withHeight along with the parameter name height. If you want to omit the argument label, use an underscore (_) instead:

func drawRectangle (_ height: Int, _ width:Int) {

print(height + " " + width)

}

Function parameters and return Now that you know how to write a function, try writing a function for the following statement; write a function which adds to the input name and returns the new value:

func addHello (name: String) -> String {

return"Hello "+ name

}

Now, modify the function to accept the first name and last name. Multiple parameters are separated by a comma:

func addHello (firstName: String = "James", lastName: String) -> String {

return"Hello "+firstName+" "+lastName

}

You must have noticed the in the parameters. This is the default If the firstName is not passed, James would be the default value for the When you do this and try to call the function, you will see that autocomplete gives you two options as seen in Figure

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