This chapter introduces relational and logical operators. It also discusses the use of these operators to write Boolean expressions.
Answer:flour >= 4 true sugar >= 2 false
Examine this part of the program:
// check that there is enough of both ingredients
if ( flour >= 4 && sugar >= 2 )
System.out.println("Enough for cookies!" );
For you to have enough ingredients, both relational expressions must be true. This is the role of the
&& (and-operator) between the two relational expressions. The
&& requires that both
flour >= 4
sugar >= 2
are true for the entire expression to be true. The entire question must be true in order for the true branch to execute.
The and operator
&& is a logical operator. A logical operator examines two true/false values and outputs a single true/false value.
What is printed if the user enters 6 for
flourand 4 for