Tutorial 3B, Exercise 3, p. 169

Use parentheses because concatenation operator + has higher precedence than comparison or logical operators.

First group: document.writeln("returnvalue = expression; is " + expression);
document.writeln("returnValue = 2 == 3; is " + 2 == 3);
document.writeln("returnValue = "2" + "3"; is " + "2" + "3");
document.writeln("returnValue = 2 >= 3; is " + 2 >= 3);
document.writeln("returnValue = 2 <= 3; is " + 2 <= 3);
document.writeln("returnValue = 2 + 3; is " + 2 + 3);
document.writeln("returnValue = (2 >= 3) && (2 > 3); is " + (2 >= 3) && (2 >3));
document.writeln("returnValue = (2 >= 3) || (2 > 3); is " + (2 >= 3) || (2 >3));

Second group: document.writeln("returnvalue = expression; is " + (expression));
document.writeln("returnValue = 2 == 3; is " + (2 == 3));
document.writeln("returnValue = "2" + "3"; is " + ("2" + "3"));
document.writeln("returnValue = 2 >= 3; is " + (2 >= 3));
document.writeln("returnValue = 2 <= 3; is " + (2 <= 3));
document.writeln("returnValue = 2 + 3; is " + (2 + 3));
document.writeln("returnValue = (2 >= 3) && (2 > 3); is " + ((2 >= 3) && (2 > 3)));
document.writeln("returnValue = (2 >= 3) || (2 > 3); is " + ((2 >= 3) || (2 > 3)));