BASIC3

BASIC3.WPS

BASIC LANGUAGE PROGRAMMING

USING VARIABLES IN SIMPLE PROGRAMS

When we design programs in basic we must often assign values to variables. The BASIC programming language allows for 2 basic types of variables.

Numeric variables represent numbers only. EXAMPLES:

AGE = 19

TEMPERATURE = 98.6

YEAR = 1995

String variables represent information other than just numbers. The variable name must

end in a $ sign and information must be put in quotes. EXAMPLES:

ADDRESS$ = "10 KING ST."

PHONE$ = "555-1234"

NAMES$= "JANE SMITH"

NOTE*** Almost Any name can be used for a variable name except:

1) BASIC COMMANDS

2) NAMES CANNOT BEGIN WITH A NUMBER

3) NAMES CANNOT HAVE SYMBOLS IN THEM (EX:@,#,?)

Complete the following exercise and write beside each variable if the

variable is a string or numeric variable and if the variable is valid or invalid.

If the variable is invalid, write why it is invalid on the VALID/INVALID line.

If the variable is invalid, write the reason it is invalid to the right

of the VALID/INVALID space.

VARIABLE TYPE VALID/INVALID

1) END _____________ __________________

2) G$ _____________ __________________

3) 4GATE _____________ __________________

4) QUESTION _____________ __________________

5) TAXES*$ _____________ __________________

6) AGE$ _____________ __________________

7) REM _____________ __________________

8) YEARS OLD _____________ __________________

9) 4STAFF _____________ __________________

10) STAFF4 _____________ __________________

11) 4STAFF$ _____________ __________________

12) G.S.T. _____________ __________________

13) G.S.T.$ _____________ __________________

14) DIR _____________ __________________

15) PAINT$ _____________ __________________

16) BYE$ _____________ __________________

17) G*O*$ _____________ __________________

18) SCHOOL _____________ __________________

19) SCHOOL$ _____________ __________________

20) SCHOOL15 _____________ __________________

21) LIST _____________ __________________

22) BILL% _____________ __________________

23) 1ST _____________ __________________

24) ^^^HOUSE _____________ __________________

25) LET _____________ __________________

26) LET$ _____________ __________________

27) CLEAR _____________ __________________

28) 98SKIDOO _____________ __________________

29) BY _____________ __________________