Basic Programming Constructs¶
Let us recollect some of the basic programming constructs of Python.
We can perform all standard arithmetic operations using standard operators.
Comparison Operations (==, !=, <, >, <=, >=, etc)
All the comparison operators return a True or False (Boolean value)
We typically use comparison operators as part of conditionals.
We can iterate through collection using
for i in lwhere l is a standard collection such as list or set.
Python provides special function called as
rangewhich will return a collection of integers between the given range. It excludes the upper bound value.
In Python, scope is defined by indentation.
Let us perform few tasks to quickly recap basic programming constructs of Python.
Get all the odd numbers between 1 and 15.
Init signature: range(self, /, *args, **kwargs) Docstring: range(stop) -> range object range(start, stop[, step]) -> range object Return an object that produces a sequence of integers from start (inclusive) to stop (exclusive) by step. range(i, j) produces i, i+1, i+2, ..., j-1. start defaults to 0, and stop is omitted! range(4) produces 0, 1, 2, 3. These are exactly the valid indices for a list of 4 elements. When step is given, it specifies the increment (or decrement). Type: type Subclasses:
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
list(range(1, 16, 2))
[1, 3, 5, 7, 9, 11, 13, 15]
Print all those numbers which are divisible by 3 from the above list.
for i in list(range(1, 16, 2)): if i % 3 == 0: print(i) else: print('Not divisible by 3')
Not divisible by 3 3 Not divisible by 3 Not divisible by 3 9 Not divisible by 3 Not divisible by 3 15