#Author:  James Tam
#Version: October 28, 2024

#Learning objective:
#*Opening a file.
#*Reading a single line from a file.
#*Reading multiple lines from a file until the end.
#*Closing a file

#Limitation:
#*Assumes the file is the same location as this python program.
#*Asumes no problems opening/reading from the file

file_name = input("Type in the complete file name including extension (e.g. input.txt): ")
#r = open file for reading
aFile = open(file_name,"r")

#aFile: a file variable that connects program with file.
#Actions on the file variable will be made on the actual file.
aLine = aFile.readline() 
print(aLine)
#Breaks the connection between the file variable and program.
#*File is now accessible by other programs.
#*Anything buffered (stored by program) is now written to the file (if file output occurs in the program).
aFile.close()
print("-")

#Reads line by line from file from beginning to end.
aFile = open(file_name,"r")
for line in aFile:
    #readline returns the information in the form of a string
    print(line)
aFile.close()