week 3

week 3/Can you.....md

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+	Write a program that counts for the user. Let the user enter the starting number, the ending number, and the amount by which to count
+
+Create a program that gets a message from the user and then prints it out backward

week 3/Can you.....py

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+out = input("string: ")
+print(out[::-1])

week 3/Challenge - Check For Palindromes.md

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+	Ask the user to input a sentence. Check whether it is a palindrome - i.e. it reads the same reading backwards, as forwards.
+
+	Hint: check the Python documentation for how to reverse a list or string.
+
+	You can look at this video to get some ideas for testing ;)
+
+	https://youtu.be/gAfIikFnvuI

week 3/Challenge - Check For Palindromes.py

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+out = input("string: ")
+print("Is palendrome",out[::-1] == out)

week 3/Checking for numbers.md

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+    How to check inputs to make sure that expected numbers are actually numbers. There are a number of ways to do this but the easiest is probably to use a try and except block.
+
+files: numbercheck.PNG

week 3/Checking for numbers.py

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+def int_input(text):
+	while True:
+		try:
+			user_input = int(input(text))
+			return user_input
+		except Exception:
+			print("error")
+		else:
+			break

week 3/Counting with a for loop.md

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+	When you write a program you may find that you need to count. In combination with the for loop, you can use Python's range( ) function to count in all kinds of ways.
+
+files: counter.py

week 3/Loopy string.md

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+	Understanding for Loops
+
+	All sequences are made up of elements. A string is a sequence in which each element is one character. A for loop marches through (or iterates over) a sequence one element at a time.
+
+files:  loopy_string.py

week 3/Rock, Paper Scissors.md

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+    Design a program to emulate the game Rock, Paper, Scissors.
+
+    Use Ascii art to display the choices (http://chris.com/ascii/)
+
+    - Play against the computer (randomly generate an answer)
+
+    Code up your design
+
+    Test

week 3/Rock, Paper Scissors.py

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+rock="""
+      _______
+  ---'   ____)
+        (_____)
+        (_____)
+VK      (____)
+  ---.__(___)
+
+"""
+
+paper="""
+      _______
+  ---'   ____)____
+            ______)
+            _______)
+VK         _______)
+  ---.__________)
+"""
+scissors="""
+      _______
+  ---'   ____)____
+            ______)
+         __________)
+VK      (____)
+  ---.__(___)
+"""

week 3/counter.py

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+# Counter
+# Demonstrates the range() function
+
+print ("Counting:")
+for i in range(10):
+    print (i)
+
+print ("\n\nCounting by fives:")
+for i in range(0, 50, 5):
+    print (i)
+
+print ("\n\nCounting backwards:")
+for i in range(10, 0, -1):
+    print (i)
+
+x = input("\n\nPress the enter key to exit.\n")
+

week 3/loopy_string.py

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+# Loopy String
+# Demonstrates the for loop with a string
+
+word = input("Enter a word: ")
+
+print ("\nHere's each letter in your word:")
+for letter in word:
+    print (letter)
+
+x = input("\n\nPress the enter key to exit.")