Basic types and process controls for iOS data

The way Swift declares variables is similar to JS. Basic types are basically the same as Java, with more character types.

Let: used to declare constants;

var: used to declare variables;

Basic types are: double,float,int (numeric type), Boolean (Boolean type), character (character type), Tuple (Ganso);

At this time a friend to the tuple (Ganso) did not understand. In mathematics there is the concept of Ganso, a friend who learns the Java language knows that it actually represents a collection, a set of key-value pairs. But the meta-ancestor does not support foreach traversal because a collection can traverse primarily to see if he has implemented an interface like Ienumeralbe, and Ganso does not implement the associated interface.

Process Control statements are: For, while, repeat while; (Loop statement) if else; switch; (branch statement)

Repeat while is actually a Do While loop, the usage is the same.

In fact, there is no sense of learning is very interesting, there is java,c# Foundation will feel easy to learn. Come on! Now that you have chosen, keep learning!

Basic types and process controls for iOS data