Swift hello world

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Running Swift code in terminal

  • Check Swift version
 swift --version
  • Create hello world programm
 vim test.swift
 print("Hello World")
  • Run the program in terminal
 swift test.swift

Compiling swift code to executable file

If we want to compile 2 or more swift files together, we must have a file named main.swift which is the top level executable file. Its like main function in C or C++ or Java:

  • file1: a.swift
func helloWorld(){
    print("Hello World")
  • file2: main.swift
func hello(){

To compile and create an executable program:

 swiftc a.swift main.swift -o prog

It will compile both a.swift and main.swift files linked together and create an executable file named prog. To run the executable program in terminal: