dec()

Decrements the given value by 1. If the first parameter is None or not a finite number, it resets to the third parameter. If the result goes below the second parameter, it resets to the third parameter.

dec(value, min, reset)

• Number containing the decremented or reset value.
• None in case of an error (if 'value' is of an unsupported type).

// If 'result' is NaN or None, it becomes reset (3).
result = nan();                // returns ---
result = dec(result, 0, 3);    // returns 3
result = dec(result, 0, 3);    // returns 2
result = dec(result, 0, 3);    // returns 1
result = dec(result, 0, 3);    // returns 0
result = dec(result, 0, 3);    // returns 3 (reset after going below min)

inc
dec