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[[python_club|About the Club]]\\

==== Python Club Topics - Loops ====

==== Loops ====
  - whiile loops
    - Execute a set of statements for as long as a condition evaluates to true
  - for loops 
    - Used for iterating over a sequence ( eg. list, tuple, dictionary, set, or a string )

==== while loop examples ====
  - This condition always evaluates to True, so will continue forever<code python>
i = 0
while True:
  i += 1
  print("keep going... " + str(i))
</code>
  - This condition will change to False when i updates to the value of 6<code python>
i = 1
while i <= 6:
  print(i)
  i += 1
</code>
  - Adding a **break** key word, we can stop the loop<code python>
i = 1
while i <= 6:
  print(i)
  i += 1
  if i == 5:
    break
</code>
  - Adding a **continue** key word, we can do something and continue the loop<code python>
i = 1
while i <= 6:
  print(i)
  i += 1
  if i == 5:
    print("i equals 5")
    continue
</code>
  - Adding an **else** key word, we can do something else<code python>
i = 1
while i <= 6:
  print(i)
  i += 1
else:
    print("i is no longer less than 6")
</code>

==== for loop examples ====
  - Iterates over the list and prints the items, one line at a time<code python>
fruits = ["apple", "banana", "orange"]
for x in fruits:
  print(x)
</code>
  - Iterates over the letters in a string and prints them, one line at a time<code python>
for x in "banana":
  print(x)
</code>
  - Can use the **break** key word<code python>
fruits = ["apple", "banana", "orange"]
for x in fruits:
  print(x)
  if x == "banana":
    break
</code>
  - Can use the **continue** key word<code python>
fruits = ["apple", "banana", "orange"]
for x in fruits:
  print(x)
  if x == "banana":
    print("I love bananas!")
    continue
</code>
  - Can use the **else** key word **only** if the loop exits normally ( without a break )<code python>
fruits = ["apple", "banana", "orange"]
for x in fruits:
  print(x)
  if x == "apple":
    break
else:  
  print("I'm done!")
</code>