SIMPLE INPUT AND OUTPUT

Simple input and output

In python, to get the input from the user interactively, you can use built in function input( )

The function input( ) is used in the following manner:

Variable_to_hold_the_value= input(<prompt to be display>)

For example,

name=input(‘What is Your Name’)

the above statement will display the prompt as:

in[3]: name = input(“What is your name”)

what is your name                     -type   input data here

in which you can type the name. The value that you type in front of the displayed prompt will be assigned to given variable, name

reading numbers

string values cannot be used for arithmetic or other numeric operators. For these operations, you need to have values of numeric types(integer or float).

But what you would you do if you have to read numbers (integer or float) ? The function input( ) returns the entered in string type only.

Python offers two functions int( ) or float( ) to be used with input( ) to convert the values received through input( ) into int and float type.

You can :

1 – read in the value using the input( ) function.

2 – and then use int( ) or float( ) function with the read value to change the type of input value to int or float respectively.

Possible errors when reading numeric values

If you are planning to input an integer of floating – point numbers using input( ) inside int( ) or float( ) such as shown below –

age = int(input(“Enter Your Age”))

or

per=float(input(“Enter your percentage”))

then you must ensure that the value you are entering must be in a form that is easily convertible to the target type.

1 - In other words while inputting integer values using int( ) with input( ), make sure that the value being entered must be int type compatible.  

2 – while inputting floating point values using float( ) with input( ), make sure that the value being entered must be float type compatible.