Python: Parts of speech #
- Literals:
- int (
type(5)) - float
- string (in quotes)
- boolean
- int (
- Variable names
- (no quotes)
- starts with a letter, numbers and “_” allowed after
- Operators
- 3 + 7
- Function calls
- round(7.3555, 2)
- Expressions:
- An expression has a value.
- Literals
- Operations
- Some function calls
- In other languages, “function” may be seperated from “procedure” or “subroutine”.
Arithmetic #
Numbers
>>> 1 + 2
>>> 2 - 4
>>> 3 * 7
>>> 5 / 3
>>> 5 // 3
>>> 5 % 3 # modulus, not remainder
Strings
>>> "zz" + "XX"
>>> "hello " * 3
Making choices #
Conditionals:
- if
- if / else
print("one")
if True: # False:
print("two")
#else:
# print("three")
print("four")
Boolean Expressions:
>>> True and True
>>> True and False
>>> True or True
>>> True or False
>>> not True
- Write out the truth tables for those.
