IF argument order of operations

Mike G

I'm curious about the order of evaluation in an IF statement. The snippet below is within an infinite loop. I'd rather not invoke the I2C bus, rtc.clockHour, on ever iteration, only if i == 100,000.

  repeat
  ...
      if(i++//100_000 == 0)
        if(rtc.clockHour == dhcpRenew)
          RenewDhcpLease
        i := 1

Given a logical AND, are the following two snippets equal? Will the condition return false if one of the conditions are false while not testing the other? Or are both conditions always tested?

     if(i++//100_000 == 0 AND rtc.clockHour == dhcpRenew)
        RenewDhcpLease
        i := 1

     if(rtc.clockHour == dhcpRenew AND i++//100_000 == 0)
        RenewDhcpLease
        i := 1

kuroneko

Mike G wrote: »

Or are both conditions always tested?

Unfortunately all conditions are tested (left to right).

pedward

Generally speaking, the evaluation short circuits at the first non-match in most languages.

Mike G

Unfortunately all conditions are tested (left to right).

Thanks... got it

Generally speaking, the evaluation short circuits at the first non-match in most languages.

I should have prefaced with in Spin... My query stemmed from experience with other languages.

Thanks all