1. QuickBasic
Jason Mallory

2. History Released in 1985 Version 2 introduced the IDE in 1986
Version 4.5 released in 1988
QBasic was distributed with DOS 5.0 +
BASIC Professional Development System

3. Data Types String Integer Long Integer Single Precision
Double Precision

4. Data Types
string$
single!
integer%
double#
long&

5. Data Types string$ single! integer% double# long& DIM name AS type
DIM name(x, y, z, …) AS type

6. Arithmetic, Relational, and Logical Operators
Exponentiation
Negation
Multiplication
Division
Modulo Arithmetic
Addition
Subtraction
^ - * / MOD +

7. Arithmetic, Relational, and Logical Operators
Equal To
Greater Than
Less Than
Not Equal To
Less Than or Equal To
Greater Than or Equal To
= > < <> <= >=

8. Arithmetic, Relational, and Logical Operators
Not
And Or
Exclusive Or
Equivalent
Material Implication
NOT AND OR XOR EQV IMP

9. Program Structure IF…THEN…ELSE
SELECT CASE…CASE1…CASE2…CASE ELSE…END SELECT
DO WHILE…LOOP
DO UNTIL…LOOP
FOR…NEXT

10. Error Handling SELECT ERR RESUME NEXT Code block … CASE = 1 CASE = 2

11. Evaluation Readability Writability Reliability Cost
English-like syntax
Writability
Long winded
Reliability
Interpreter vs. Compiler
Cost
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