1 / 7

# Last Class (sections 3.4 - 3.6) - PowerPoint PPT Presentation

Last Class (sections 3.4 - 3.6). What is a variable? rules for naming variables garbage values strings, chars, boolean rules for naming variables Integer Variables example from book +, -, *. Data Types: Reals. A number that contains a decimal point can begin with a ‘+’ or a ‘-’

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about 'Last Class (sections 3.4 - 3.6)' - samantha-mejia

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

• What is a variable?

• rules for naming variables

• garbage values

• strings, chars, boolean

• rules for naming variables

• Integer Variables

• example from book

• +, -, *

• A number that contains a decimal point

• can begin with a ‘+’ or a ‘-’

• must have digits on both sides of the decimal

• cannot contain

• commas

• an embedded blank

• non-numeric characters

• a’+’ or a ‘-’ at the end of the value

• +, -

• *, /

• operator precedence

• PEMDAS

• +, -

• *

• DIV “integer division”

• MOD “remainder operator”

• operator precedence

• You can assign an integer value to a real variable. The compiler automatically converts the integer into a real (ie. 5 -> 5.0)

• You cannot assign a real to an integer.

• Mixed mode is when both integers and reals are on the right side of an expression (a real variable must be on the left side).