Swift hello world

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(){
    helloWorld()
}
 
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:

./prog