I really don't understand why I need to use this \(area)?

Question

Is it really impossible to print a string "Hello" and just add an integer + b when b =2?

From a logically perspective, it makes sense to me. Computer, print Hello on the screen. And don't forget to add the variable b on the right side which contains the number 2!

Answer 1 · 2015-07-28T21:10:22Z

July 28, 2015 9:10pm

Hi, while using print() (or println() in swift 1.2) you pass arguments (what to print) to the function and they have to be of the same type, meaning that you can't do:

var b = 2
print("Hello " + b)     //this will raise an error because "Hello" is a String and b is an Int

BUT you can always cast between types of data, and something like this will work:

var b = 2
print("Hello " + String(b))     //this will print 'Hello 2' to the console

Although you could cast types like that I would still recommend normal string interpolation ("\(area)") just because it is pretty conventional among programmers and easy to read along with better functionality as you can use functions or class methods instead variables and pass them to the print() function:

func calculateArea(width: Int, height: Int) -> Int {
      return width * height
}

print("The area is: \(calculateArea(2, height: 6))")      // will print: 'The area is: 12'

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Fedor Andreev

Fedor Andreev

I really don't understand why I need to use this \(area)?

1 Answer

Stepan Ulyanin

Stepan Ulyanin