High-level Programming Language (Pascal)

Arithmetic Expressions in Pascal

• similar to the mathematical expressions
• an expression can be a constant, a variable or a combination of constants, variables and operators
• a list of mathematical operators and Pascal operators is shown below :
  
  

  Mathematical Operator	Pascal Operator	Operation	Example	Result
  +	+	Addition	3+2	5
  -	-	Subtraction	3-2	1
  -	-	Unary Minus	-3	-3
  ×	*	Multiplication	3*2	6
  ÷	/	Real Division	5/2	2.5
  ÷	div	Integer Division	5 div 2	2
  mod	mod	Modulo (remainder)	5 mod 2	1

  
  
• the order of precedence
  
  

  Level of Precedence	Arithmetic Operator
  highest	( )
  high	- (unary minus)
  low	*, /, mod, div
  lowest	+, - (subtraction)