Week 1 03 25

Plan

• Create project and a directory
• First program, hello world
• if/elif/else, while/for/break/continue
• A guess game

Homework

• Modify guess.py, to guess a number in range 1-100
• Modify guess.py, to limit the number of guess to 10. If you guess the right number within 10 tries, print "You Win", otherwise, print "You Lose".
• You should ALWAYS win. If you change the range to 1-1000, will you ALWAYS win?
• Adding a new function to toy.py

def sumodd(n):
    ''' Return sum of the first n odd numbers.'''
    # Your code here.

• import toy, then run sumodd. What is the result of sumodd(1)? 2? 3? 100? 200?
• Adding a new function to toy.py

def gcd(a, b):
    ''' Return the greatest common divisor of a and b '''

• What is gcd(123456789, 987654321)?