Mega Code Archive

And - boolean and or bitwise and of two arguments

1 Boolean expression and Boolean expression 2 Integer expression and Integer expression Description The And keyword is used in two different ways: 1. To perform a logical or boolean 'and' of two logical values. If both are true, then the result is true, otherwise, the result is false. 2. To perform a mathematical 'and' of two integers. The result is a bitwise 'and' of the two numbers. For example: 10110001 And 01100110 = 00100000 Notes If the boolean expression is calculated (as opposed to being a Boolean variable), then brackets are required to isolate it. Related commands Not Boolean Not or bitwise not of one arguments Or Boolean or or bitwise or of two arguments Xor Boolean Xor or bitwise Xor of two arguments Example code : Illustrate both types of and usage var num1, num2, num3 : Integer; letter : Char; begin num1 := $25; // Binary value : 0010 0101 num2 := $32; // Binary value : 0011 0010 // And'ed value : 0010 0000 = $20 = 32 dec letter := 'G'; // And used to return a Boolean value if (num1 > 0) And (letter = 'G') then ShowMessage('Both values are true') else ShowMessage('None or only one true value'); // And used to perform a mathematical AND operation num3 := num1 And num2; ShowMessageFmt('$25 And $32 = $%x',[num3]); end; Show full unit code Both values are true $25 And $32 = $20