# compiles the program in File: "Hello.c", by typing "make" on
# the command line.

# if make is followed by no target then it will compile 'Hello'.
all: Hello

# before the "rm" there is only one white space character: a "TAB".
# If you have any  other white space this Makefile while not work.
clean:
	rm -f core *.o a.out Hello

# before the "gcc" there is only one white space character: a "TAB". 
# If you have any  other white space this makefile while not work.
Hello: Hello.c
	gcc Hello.c -o Hello