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iOS Swift Functions and Optionals Functions Function Return Types

Posted by Edward Cohen
Edward Cohen
1,152 Points

What is the difference between printing a value and returning a value in a function

Functions

1 Answer

Gunhoo Yoon
Gunhoo Yoon
5,027 Points
Gunhoo Yoon
Gunhoo Yoon
5,027 Points

You cannot re-use printed value but you can re-use returned value. You can think printing as sending data to screen and returning as sending data outside of function within program.

You should test this by yourself since I'm not familiar with swift.

Prepare two functions, one that prints and another that returns. Save both result as separate variable and try to print out those variable or re-use it somehow.

NOUR A ALGHAMDI
NOUR A ALGHAMDI
Courses Plus Student 5,607 Points

i tried to do this but no clear result , :(

Gunhoo Yoon
Gunhoo Yoon
5,027 Points
Gunhoo Yoon
Gunhoo Yoon
5,027 Points

Sorry I don't have knowledge in Swift but in general, programming languages agree on what print and return do.

So consider this.

// Pseudocode

// Function that only prints (on behind it actually returns void-like value such as Null, None, Undefined etc...)
function foo () {
    print(1)
}

//Function that returns.
function bar () {
    return 1
}

// These will produce different result but actual result might differ from language to language.
var x = foo() + 5
var y = bar() + 5

print(x)
print(y)