|
<< Click to Display Table of Contents >> Navigation: Explain™ Control Language > Explain™ fundamentals > Variables |
Explain™ allows you to store data in variables. Whenever you have variables (and what computer language would be useful without them?), you need to be aware of three issues:
•Data storage: Where data are stored and when are data accessible.
•Data type: What format the data are in, and what can be done to them.
•Data Value: The actual value(s) a piece of data represents.
For example, consider the simple Explain assignment statement:
A = 1
The A refers to a variable in which we have stored a value of 1. Later on, we can use the data in A:
B = A
Now A and B both contain the value 1.
There are three data-storage categories for variables: