BS1 equation in one line

Luis_P

Hello parallax experts!
Is there any way to make this equation in one line using the BS1 ?
B = timer - (A * 10)
It does not allow me to do that.
The value of timer is 35 and the value of A is 3.
The result should be equal to 5:
B = 35 - 30 = 5
Is there any way to do it?
Thanks

Phil Pilgrim (PhiPi)

-a * 10 + timer

(maybe; not a BS1 guru here)

-Phil

Luis_P

Mmmm It doesn’t make sense to me but I will give it a try! Thanks

@"Phil Pilgrim (PhiPi)" said:
-a * 10 + timer

(maybe; not a BS1 guru here)

-Phil

@"Phil Pilgrim (PhiPi)" said:
-a * 10 + timer

(maybe; not a BS1 guru here)

-Phil

Genetix

Luis_P,

Page 103 (PDF Page 107) of the BASIC Stamp Manual says:

The BS1 does not allow parenthesis in expressions. Unfortunately, all
expressions have to be written so that they evaluate as intended strictly
from left to right.

https://www.parallax.com/package/basic-stamp-manual/

Luis_P

@"Phil Pilgrim (PhiPi)" said:
-a * 10 + timer

(maybe; not a BS1 guru here)

-Phil

That works!!!!! Thank you very much!!!! I don’t understand how but is what I was looking for.
Luis

Phil Pilgrim (PhiPi)

The original parentheses indicated to do the multiplication first, before the subtraction. The new formula rearranges things so that this can be accomplished left-to-right, without the parens.

-Phil

JonnyMac

That works!!!!! Thank you very much!!!! I don’t understand how but is what I was looking for.

There is no operator precedence with the BS1; as stated, expressions are evaluated from left to right.

Tracy Allen

Lack of precedence for binary operators is also true of the BASIC Stamp 2, however, unlike the Stamp 1, the Stamp 2 does allow parentheses to change the order. So B = timer - (A * 10) works okay on the Stamp2, but without parens it would come out wrong and would have to be written like Phil suggested. B = -A * 10 + timer, strictly left to right execution. It could also be B = A * -10 + timer, because unary operators do take precedence over binary operators on either Stamp. Parentheses do make things a lot easier on the Stamp2,

Luis_P

Thank you to all of you. Now I understand how it works on the BS1!

Grazie!

@"Tracy Allen" said:
Lack of precedence for binary operators is also true of the BASIC Stamp 2, however, unlike the Stamp 1, the Stamp 2 does allow parentheses to change the order. So B = timer - (A * 10) works okay on the Stamp2, but without parens it would come out wrong and would have to be written like Phil suggested. B = -A * 10 + timer, strictly left to right execution. It could also be B = A * -10 + timer, because unary operators do take precedence over binary operators on either Stamp. Parentheses do make things a lot easier on the Stamp2,