Python - Basics ~ whereisstuff

Basics of python language:

To write a c++ program, the following details are needed.

1. Command-line:

It describes what's going on inside a program, so that person looking at the source code does not have a hard time figuring it out.

Types of comments:

(i) Single line comments:

Syntax:

#Statements

Example:

#print function

(ii) Multiline comments:

Syntax:

‘’’Set Statements ‘’’

2.Variables:

A variable is nothing but it allocates the memory space and holds the values.

Syntax fro declaring variables:

variable_name=value;

Example:

a=0 #int data type

s=’ ‘ #String data type

Rules for naming the variables:

The first character must be an alphabet or an underscore (_).
No commas or blank spaces are allowed within a variable name.
No special symbols, an underscore can be used in a variable name.

3. Data types in python:

The most widely used data types in the input function is:

4. Output function:

This function is used to show details on the output screen for user understanding.

Syntax:

print(“Statements”) or

print(‘Statements’)

5. Escape sequence:

This is used to align output on the screen.

Escape sequence	Description	Example	Output
\n	Newline or next line	print(“Hai! \n I am Sabrina.”)	Hai! I am Sabrina.
\t	Horizontal tab(one tab space)	print(“Hai\t Hello”)	Hai hello
\’	Display single-quotes	print(“I don\”t know”)	I don’t know
\”	Display double-quotes	print(“/“Hey/”’)	“Hey”
\\	Print slash	print(“a//b”)	a/b

6. Input function:

This function is used to get value from users.

Syntax:

Variable_name = data_type(input(“ Sentence “))

Example:

a=int (input(“Enter a value : “))

Example program: save example.py

#Write a python program to add of two elements
name=input("Enter your name : ")
a=int(input("Enter a value : "))
b=int(input("Enter b value : "))
c=a+b
print("Add of and b value is : ",c)

Explanation:

name=input("Enter your name : ")

name=str(input("Enter your name : ")) both are same for getting string values.

Output:

Example 2:

If need multiple inputs at one line, then refer to the below program.

Program:

name=str(input("Enter calculation name : "))
a,b=input("Enter a and b value : ").split()
c=int(a)+int(b)
print("Add a of and b value is : ",c)

Explanation:

split() function is used to separate a string from each space.
int(a)+int(b) means, a and b value has string so should be changed into number data type because here performing add operation.

Output:

Example 3:

If displaying value at the sentence like “Add of a and b value is : 10” as “Add of 5 and 5 value is :10”

Program:

name=str(input("Enter calculation name : "))
a,b=input("Enter a and b value : ").split()
c=int(a)+int(b)
print(name+" of "+a+" and "+b+" value is : ",c)

Explanation: