print() function outputs one or more values to the terminal.
print("Hello, world!")// Prints: Hello, world!
The program runs line by line, from top to bottom:
Single-line comments are created using two consecutive forward slashes. The compiler ignores any text after
// on the same line.
// This line denotes a comment in Swift.
Multiline comments are created using
/* to begin the comment, and
*/ to end the comment. The compiler ignores any text in between.
/*This is all commented out.None of it is going to run!*/