Commodore 128D - SECTION 5 - Advanced BASIC 7.0 Commands

SECTION 4
Basic
Programming
COMPUTER DECISIONS-The IF-THEN Statement 51
Using the Colon 52
LOOPS—The FOR-NEXT Command 53
Empty Loops—Inserting Delays in a Program 54
The STEP Command 54
INPUTTING DATA 55
The INPUT Command 55
Assigning a Value to a Variable 55
Prompt Messages 56
The G ET Command 57
Sample Program 58
The READ-DATA Command 59
The RESTORE Command 60
Using Arrays 61
Subscripted Variables 61
Dimensioning Arrays 62
Sample Program 63
PROGRAMMING SUBROUTINES 64
The GOSUB-RETURN Command 64
The ON GOTO/GOSUB Command 65
USING MEMORY LOCATION 65
Using PEEK and POKE for RAM Access 65
Using PEEK 66
Using POKE 66
BASIC FUNCTIONS 67
What Is a Function? 67
The INTEGER Function (INT) 67
Generating Random Numbers—The RND Function 68
The ASC and CH R$ Commands 69
Converting Strings and Numbers 69
The VAL Function 70
The STR$ Function 70
The Square Root Function (SQR) 70
The Absolute Value Function (ABS) 70
THE STOP AND CONT (CONTINUE) COMMANDS 70
49 USING C128 MODE-Advanced BASIC Programming