Logical Operators
- && : returns true only if both the operands are true, otherwise returns false.
- || : returns true only if either of the operand is true, otherwise returns false.
- ! : negates the operand, returns true if the operand is false and return false if the operand is true.
Example
<!DOCTYPE html>
<html>
<head>
<title>javaScript Logical Operators</title>
</head>
<body>
<h1>JavaScript Logical Operators</h1>
<script>
var number1 = true;
var number2 = false;
var number3 = true;
document.write("number1 && number3 :" + (number1 && number3) + "<br />");
document.write("number1 && number2 :" + (number1 && number2) + "<br />");
document.write("number1 || number3 :" + (number1 || number2) + "<br />");
document.write("number1 || number3 :" + (number1 || number3) + "<br />");
document.write("!(number1 && number3) :" + !(number1 && number3) + "<br />");
document.write("!(number1 && number2) :" + !(number1 && number2) + "<br />");
document.write("!(number1 || number3) :" + !(number1 || number2) + "<br />");
document.write("!(number1 || number3) :" + !(number1 || number3) + "<br />");
</script>
</body>
</html>
Conditional Operators
- ?: - returns the second operand if the first operand is true. However, if the first operand is false, it returns the third operand.
Example
<!DOCTYPE html>
<html>
<head>
<title>javaScript Conditional Operators</title>
</head>
<body>
<h1>JavaScript Conditional Operators</h1>
<script>
var number1 = true;
var number2 = false;
var number3 = true;
document.write("number1 && number3 ? number1 : number3 : Result - " + (number1 && number3 ? number1 : number3) + "<br />");
document.write("number1 && number2 ? number1 : number2 : Result - " + (number1 && number2 ? number1 : number2) + "<br />");
</script>
</body>
</html>
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