Python is a very simple style syntax language. It uses a new line for a new statement. A line space for the scope of the functions and loops.
Why Should You Learn?
- Python is very popular among data science and machine learning developers.
- Google, DropBox, Facebook, and Amazan companies are using Python as a major language for software development.
- It is used for numerical and mathematical computing.
- It is functional, procedural, object-oriented and also works as the scripting language.
In this tutorial, I will write some programs to illustrate the concept
Sum of Two Numbers
sum=0 #sum variable initialized to 0 x=3 #x variable initialized to 3 y=5 #y variable initialized to 5 sum = x + y # Add x and y and assigns to sum print ( sum) # Prints sum of x and y
The Output of the program would be 8
Sum of Natural Numbers
sum=0 #Initialize variable sum equal to zero i=0 #Initialize variable i equal to zero while i <= 10: # Check the condition sum += i # Sum of natural numbers i += 1 # Increment the variable i print(sum) # Print sum of the natural numbers
The output of the program would be 55
Factorial of Natural Numbers
fact=1 #Initialize variable fact equal to 1 i=1 # Initialize variable i equal to 1 while i <= 5: # Check the condition fact *= i # Calculate factorial i += 1 # Increment the variable i print(fact) # Print Factorial
The output of the program would be 120
“import” statement in Python
To use modules library, Python uses import command.
For instance, if you want to use a random number generator.
You will write as
and you will be able to use the function fmod (x,y).
See the program
import math print(math.fmod(35,4))
The output of the program
fmod(x, y) function is defined in math.py library.
“as” statement with import
“as”statement is used to create an alias of library name.
The same program you can write as
import math as m print(m.fmod(35,4))
A function is a block of statements that performs a specific task.
Python uses def keyword to define a function.
For example, add function for adding two numbers
def add(x,y): return x+y print(add(5,3))
Calculating factorial of a natural number
def factorial( n): fact=1 i = 1 while i < n: i+= 1 fact = fact * i return fact print(factorial(5))