Simple types of varibles
The use of varibles and consts in iPhone programming is very essential for creating
Applications and Games, Varibles helps us store temporary information, calculate data, make run time decitions and much much more.
Strings
Strings are combanation of letters (and numbers) - Text;
"This is 1 string"
in Xcode, we use NSString for strings use.
NSString *myString = [NSString stringWithString:@"This is 1 string"];
This will add a string with letters and numbers to the Varible "myString"
we can also add numbers:
NSString *myString = [NSString stringWithFormat:@"%d", 5];
the syntax @"%d", represent an integer (a number)
Integers
integers are used to store numbers, there are two easy to use Integer formats that we can use in our app.
int & NSInteger.
Integers are "whole number" format, meaning we can use numbers like 5, 10,1, 0, -5, -20 etc. but we cant
use numbers like -20,-3 etc.
In Xcode, we can declare and use integers as shown below
int *myInt = 5;
NSInteger *myInt = [myArray integerValue];
Floats
Float numbers are used to store and work with numbers that are not whole numbers like 5.5, 3,3 etc.
In Xcode, we can declare and use Float numbers as shown below
float myFloat = 3.41;