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iOS Objective-C Basics (Retired) Functional Programming in C Functions

Posted by Tyler Phillips
Tyler Phillips
495 Points

Need help with this concept.

Implement a function named "addTwo" that returns the sum of two floats. The function will accept two float numbers as arguments. It should add the two arguments together, and return the result. (No need to write the main function. Just write out the implementation for the addTwo function.)

Thanks

4 Answers

Rashii Henry
Rashii Henry
16,433 Points
Rashii Henry
Rashii Henry
16,433 Points

float addTwo(float x, float y) { float sum = ( x + y); return sum; }

whenever you're implementing a function(or method in Obj-C) you start with the return type. I started with float. Then you want to name your function, in this case it's addTwo. Right after the name you pass in the parameters separated by commas, make sure before you name those variables you specify the return type. After your done passing in those, open up the curly braces to give this function some instructions. The question wants to return the sum, so i created a new float variable called sum and assigned it the function x + y; After that just return the new variable you just created.

Tyler Phillips
Tyler Phillips
495 Points
Tyler Phillips
Tyler Phillips
495 Points

Great, just was I was looking for.

Rashii Henry
Rashii Henry
16,433 Points
Rashii Henry
Rashii Henry
16,433 Points

what have you tried already? i don't want to just plain out give you the answer.

Jose Estrella
Jose Estrella
1,529 Points
Jose Estrella
Jose Estrella
1,529 Points

why does the first line below, not have a semi colon?

float addTwo (float x, float y)

Rashii Henry
Rashii Henry
16,433 Points
Rashii Henry
Rashii Henry
16,433 Points

Good question, but when you're typing a method inside of the implementation you always have to follow it with curly braces to let xCode know that you're about to implement what you want this method to do.

however, inside of the header file. you can just end the line with a semicolon because in the header file you're telling xcode, get ready for this method I'm about to implement.

Jose Estrella
Jose Estrella
1,529 Points
Jose Estrella
Jose Estrella
1,529 Points

ok got it, thank you your explanation for this challenge really helped me!