# File: a02_functions.py
# your name: 
# your email:
# 
#

# function 0: an example of funciton definition
def opposite(x):
    """ returns the opposite of its input
        input x: any number (int or float)
    """
    return -1*x


# put your definitions for the remaining functions below





# This section contains test cases, which will execute your functions
# and print out the results. These tests are "protected" (by indentation) within 
# an if statement, which will prevent them from running on the Gradescope server.
# You must write all of your test cases within this indented block.
if __name__ == '__main__':

	# make sure all of your test cases are indented by 1 tab, following the example below.

    # write your test code for all functions below.
    # for example:
    print('opposite(3) =', opposite(3))