Shorthand numeric updates: Difference between revisions
Created page with "Color 64 allows a numeric variable or numeric array element to be updated without repeating the variable name on the right side of the assignment. For example: <strong>A+12</strong> is equivalent to: <strong>A=A+12</strong> Subtraction is also supported: <strong>A-12</strong> is equivalent to: <strong>A=A-12</strong> When no expression follows the operator, Color 64 assumes a value of one: <strong>A+</strong> is equivalent to: <strong>A=A+1</strong> <strong>A-</stron..." |
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[[programming features|Programming Features]] - <strong>Shorthand Numeric Updates</strong> | |||
Color 64 allows a numeric variable or numeric array element to be updated without repeating the variable name on the right side of the assignment. | Color 64 allows a numeric variable or numeric array element to be updated without repeating the variable name on the right side of the assignment. | ||
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Note: Shorthand updates to integer variables use direct 16-bit arithmetic. If the result exceeds the integer range of -32768 through 32767, the value may wrap around rather than generate an overflow error. | Note: Shorthand updates to integer variables use direct 16-bit arithmetic. If the result exceeds the integer range of -32768 through 32767, the value may wrap around rather than generate an overflow error. | ||
Next Section: [[ml command set|ML Command Set]] | |||
Latest revision as of 14:22, 29 July 2026
Programming Features - Shorthand Numeric Updates
Color 64 allows a numeric variable or numeric array element to be updated without repeating the variable name on the right side of the assignment.
For example: A+12 is equivalent to: A=A+12
Subtraction is also supported: A-12 is equivalent to: A=A-12
When no expression follows the operator, Color 64 assumes a value of one: A+ is equivalent to: A=A+1
A- is equivalent to: A=A-1
The value following the operator may be any valid numeric BASIC expression. For example:
- A+X*2
- A-(B+C)
- HM+
- N%(I)-1
Both floating-point and integer variables are supported, including array elements. String variables are not supported by this shorthand syntax.
Only the addition (+) and subtraction (-) operators should be used. Other arithmetic or logical operators are not supported in this form.
Note: Shorthand updates to integer variables use direct 16-bit arithmetic. If the result exceeds the integer range of -32768 through 32767, the value may wrap around rather than generate an overflow error.
Next Section: ML Command Set