| 1.5.1.Variables |
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- You can store values in variables.
- Each variable is identified by a variable name.
- Each variable has a variable type.
- Variable names start with a letter or underscore (_), followed by any number of letters, digits, or underscores.
- Uppercase is different from lowercase, so the names sam, Sam, and SAM specify three different variables.
- The variables are defined at the begining of the block.
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The following is an example of some variable names: |
average /* average of all grades */
pi /* pi to 6 decimal places */
number_of_students /* number students in this class */
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The following are not variable names: |
3rd_ /* Begins with a number */
all$ /* Contains a "$" */
the end /* Contains a space */
int /* Reserved word */
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Meaningful variable name: |
entry_total /* total number of items in current entry */
all_total /* total of all entries */
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