Lesson_03.md

Lesson 3

Previously

1. Basic types (int, float, complex, bool)
2. Container types (str, list, dict)
3. Control flow: for/range and if/elif/else

Some things to remember:

• Implicit type casting (3 / 2 == 1 vs. 3 / 2.0 == 1.5) can happen!
• Strings are wrapped in quotes, either double " or single '
• You can concatenate strings with +
• You can add numbers with +

Wait! What's happening here?

The + operator is polymorphic. For things of type int or float it is addition. For things of type str it concatenates them (i.e. "adds" them).

Back to things to remember:

• for i in range(10):
• i is bound to the element for each loop
• range(x) is a function that creates a list
• if(condition1 and condition2):
• Remember to add the : at the end
• Indentation!

e.g.

for i in range(100):
  if(i % 2 == 0 and i % 3 == 0):
    print('FizzBuzz')
  elif(i % 2 == 0):
    print('Fizz')
  elif(i % 3 == 0):
    print('Buzz')
  else:
    print(i)

This time: more control flow!

• SciPy lecture notes 1.2.3
• Maybe time for functions... SciPy lecture notes 1.2.4