Subtract '-'

Syntax

Assignment Variable = Variable - Variable

Overview

Subtracts variables and/or constants, returning an unsigned or signed 8, 16, 24, 32-bit or floating point result.

Operands

Variable can be a constant, variable or expression. Assignment Variable can be any valid variable type.

Subtract works exactly as you would expect with signed and unsigned integers as well as floating point.

Example 1

Device = 18F26K40             ' Select the device to compile for
Declare Xtal = 16  ' Tell the compiler the device will be operating at 16MHz
Declare Hserial_Baud = 9600   ' Set the Baud rate for HRsoutLn

Dim wMyVar1 as Word = 1000    ' Create a variable and assign a value to it
Dim wMyVar2 as Word = 999      ' Create a variable and assign a value to it

wMyVar1 = wMyVar1 - wMyVar2    ' Subtract the numbers
HRsoutLn Dec wMyVar1           ' Display the result

Example 2

  Device = 18F26K40             ' Select the device to compile for
  Declare Xtal = 16  ' Tell the compiler the device will be operating at 16MHz
  Declare Hserial_Baud = 9600   ' Set the Baud rate for HRsoutLn

' 32-bit subtraction
  Dim wMyVar1 as Word
  Dim dMyVar2 as Dword

  wMyVar1 = 1575
  dMyVar2 = 9763647
  dMyVar2 = dMyVar2 - wMyVar1    ' Subtract the numbers
  HRsoutLn Dec wMyVar2           ' Display the result

Example 3

  Device = 18F26K40             ' Select the device to compile for
  Declare Xtal = 16  ' Tell the compiler the device will be operating at 16MHz
  Declare Hserial_Baud = 9600   ' Set the Baud rate for HRsoutLn

' 32-bit signed subtraction
  Dim dMyVar1 as SDword = 1575
  Dim dMyVar2 as SDword = 9763647

  dMyVar1 = dMyVar1 - dMyVar2    ' Subtract the numbers
  HRsoutLn SDec dMyVar1         ' Display the result

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