How to Read Data From KeyBoard

Reading data from the Keyboard:-

Read the data from the keyboard in any programming language  by default it takes string format only,
browser(string format),

command prompt(text format).

• in c-language by using  scanf function.

• in java language by using InputBufferReader, InputStream,Scanner.

• in python2.7 by using input( ) and raw_input( ).

• in python3.5 by using input( )

We can read the data from the keyboard in python2.x by using input( ) and raw_input( )

• Python2.x ----> input( ), raw_input( )  for string data type.

• in python2.x-----> type conversion is implicitly

If we use Python 2.7 version for taking input as String data type then we must use raw_input whereas for other data types we can use as below.

Example 1:

x=raw_input ('enter fname :')

print(x)

y=raw_input ('enter lname :')

print(y)

print(x+y)

Output:

========= RESTART: C:/Python27/keyboard.py =========

enter fname: siva

siva

enter lname: krishna

krishna

sivakrishna

Example 2:

x=input ('enter first integer :')

print(x)

y=input ('enter second integer :')

print(y)

print(x+y)

Output:

========= RESTART: C:/Python27/keyboard.py =========

enter first integer:3

3

enter second integer:6

6

9

 We can read the data from the keyboard in python3.x by using input( )

• In Python3.x -----> input( )

• In Python3.x -----> type conversion is explicitly

Example 1:

x=input('enter fname: ')

print(x)

y=input('enter lname: ')

print(y)

print(x+y)

Output:

enter fname: siva

siva

enter lname: krishna

krishna

sivakrishna

Example2:

x=input('enter first integer: ')

print(x)

y=input('enter second integer: ')

print(y)

print(x+y)

Output:

enter first integer: 4

4

enter second integer: 5

5

45

Note:

above example my requirement is addition of two numbers, but output will be show concatination. here we are going type conversion mechanism.

Example3:

x=int(input('enter first integer: '))

print(x)

y=int(input('enter second integer: '))

print(y)

print(x+y)

Output:

enter first integer: 4

4

enter second integer: 5

5

9

Example4:

x=input('enter first integer: ')

print(x)

i=int(x)

y=input('enter second integer: ')

print(y)

j=int(y)

print(x+y)

Output:

enter first integer: 4

4

enter second integer: 5

5

9