Lesson 10

Integers and Real Numbers

Integers are whole numbers or numbers without decimals.

Example: 1, 2, 5, 10

Real Numbers and Float types numbers have decimals.

Example: 1.5, 2.7, 5.98, 10.99

FLOATs store floating point numbers with 8 place accuracy and take up 4 bytes.

DOUBLEs store floating point numbers with 16 place accuracy and take up 8 bytes.

REAL is a synonym of FLOAT for now.

In the following program we'll use commands to allow for float and integers. These commands are:

• float()
• float(input())
• int()
• round()

From the output you can see the following effects

• float() - this makes a number a float type number (adding a decimal)
• float(input()) - this is one way to input a float type number
• int() - this converts a number with a decimal (like a float) to an integer (no decimal)
• round() = this rounds numbers to the nearest whole

Converting Strings to Integers

int() can also be used to convert a string to an integer. Once it is an integer, you can perform mathematical functions on it.

float() can be used to convert a string to a number with a decimal.

Try the example below:

SHORTCUTS

You can put an input statement inside of the float() function to save a line if you ever just need a float entered.

For an example, try the following program:

Assignment #10

Create a program that asks you how may eggs you have.

• If the user enters a number that is not an integer, the program will ask them to enter another number. (error checking)
• It will then ask you how many eggs fit in a carton.
• If the user enters a number that is not an integer for the carton number, the program will ask them to enter another number. (error checking)
• The program will then tell you how many cartons you can make out of the eggs you have.
• If there are leftover eggs that don't fit into a carton, it will tell you how many eggs are left over (not put into a carton).
• The program will ask you if you want to repeat it at the end. Anything but y exits.

The output should look like the following.

Goal : Do this without using While True or Break (regular while loops are ok, I'm just saying that you shouldn't use a While True with a Break because it's considered bad form) in under 28 lines including your name on line 1 in comments.