"""
i/o
input / output
standard input dev.     keyboard
standard output dev.    monitor/screen/console

*object
sep = separator
end = '\n'

"""


print("hello")
print("hello","world", sep="_")
print("hello","world", sep=",")
print("hello","world", sep=";")
print("hello","world", sep=":")
print("hello","world", sep="::")
print(1,2,3,4, sep="::")

print("==============")
print()
print("==============")
print(end='\n')
print("==============")
