Learn Java with Math: Using Fun Projects and Games

© Ron Dai 2019

R. DaiLearn Java with Mathhttps://doi.org/10.1007/978-1-4842-5209-3_10

10. Logical Control Structures

Ron Dai¹ 

(1)

Seattle, WA, USA

 

Very similarly to how we describe it verbally when there is a logical conversation, the if and the if/else in programming languages are common structures to make conditional decisions and choose corresponding execution paths (Figure 10-1).

Figure 10-1

The if structure

if (a == 3) {

       <do something>

}

This is similar to, but not completely the same, as:

if (a == 3) {

       <do something>

} else {

       <do something else>

}

Figure 10-2 is the whole workflow of the if/else logical control structure.

Figure 10-2 ...