Programare swift Swift tutorial from tutorials point | Page 21

Swift 4
precedence prefix Protocol required
right set Type unowned
weak willSet
Whitespaces
A line containing only whitespace, possibly with a comment, is known as a blank line, and
a Swift 4 compiler totally ignores it.
Whitespace is the term used in Swift 4 to describe blanks, tabs, newline characters, and
comments. Whitespaces separate one part of a statement from another and enable the
compiler to identify where one element in a statement, such as int, ends and the next
element begins. Therefore, in the following statement:
var age
there must be at least one whitespace character (usually a space) between var
and age for the compiler to be able to distinguish them. On the other hand, in the following
statement:
int fruit = apples + oranges
//get the total fruits
no whitespace characters are necessary between fruit and =, or between = and apples,
although you are free to include some for better readability.
Space on both side of a operator should be equal, for eg.
int fruit= apples +oranges
int fruit = apples + oranges
//is a wrong statement
//is a Correct statement
Literals
A literal is the source code representation of a value of an integer, floating-point number,
or string type. The following are examples of literals:
92 // Integer literal
4.24159 // Floating-point literal
"Hello, World!" // String literal
Printing in Swift
To print anything in swift we have ‘ print ‘ keyword.
print has three different properties.
Items – Items to be printed
Separator – separator between items
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