View source for Conversions - Python

=Data Type Conversions=
==Convert to Integer==
Python has built in functions to convert between different data types. To convert something to an integer you would enter:

<syntaxhighlight lang=python>
number = int( textEntered)
</syntaxhighlight>

or if you wanted to get the input direct from the user you could do this instead:

<syntaxhighlight lang=python>
name = int( input(“enter a number”) )
</syntaxhighlight>

==Convert to String==
In the previous section [[Variables - Python |Variables]] you needed to convert the values entered by the user to an integer in this way. You may also need to convert in the opposite way:

<syntaxhighlight lang=python>
text = str( number)
</syntaxhighlight>

or if you wanted to convert and display the number you could do this instead:

<syntaxhighlight lang=python>
print("the number entered was: " + str(number) )
</syntaxhighlight>

==Convert to Float==
In the previous section [[Variables - Python |Variables]] you needed to calculate how many Euros you would get for a given number of Pounds and an exchange rate. This would be more accurate using a float instead of an integer:

<syntaxhighlight lang=python>
pounds = float( input("Enter the amount in Pounds: ") )
rate = float( input("Enter the exchange rate: ") )
euros = pounds * rate
</syntaxhighlight>


==Others==
Other conversion functions are available:

[[File:Conversions in python.png|600px]]

=Now Try=
'''1)''' Write a program that asks the following questions:===

#How many children are there?
#How many sweets do they each have?
#How many ducks were there?
#How many sweets did each child give each duck?

It should then write a “thrilling” story:

 There were [Number of children] children each with a bag containing [Number of Sweets] sweets.  They walked past [Number of ducks] ducks.<br>  
 Each child gave [Number of sweets each child gives each duck] sweets to each of the ducks and ate one themself. They decided to put the  rest into a pile.<br>
 They counted the pile and found it contained [Number of sweets left] sweets.

'''HINT:''' you will need to convert the input to an integer for each input. eg children = int( input("Enter the number of children") )<br>
'''HINT:''' you will need to convert the numerical output to a string. eg print( str(sweets) )<br>

'''2)''' Create a program to convert Pounds Stirling into Euros.

#It should ask the user to input the amount in Pounds to convert.
#It should use the exchange rate of 1.17 Euros to 1 Pound.
#It should display the message:
 X Pounds Stirling is Y Euros, at the exchange rate of 1.17 Euros to the Pound

'''HINT:''' you will need to convert the numerical input to a float. eg pounds = float( input("Enter the number of Pounds") )<br>
'''HINT:''' you will need to convert the numerical output to a string. eg print("Euros: " + str(euros) )<br>

'''3)''' Now create a version of the above program to allow the user to also input the exchange rate to use.