Topics Discussed: Case logic, case structure, case scope, breaking, case fallthrough, case study calculator

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Case Logic
Case logic is tremendously useful in cases where you might have something like a menu where a user selects something from a set of options. The basic syntax of a case is as follows:

int x = input.nextInt();
switch (x){  //x could be anything, int, double, char, etc.
    case 0:{  //this will execute if x = 0
        //do stuff
    break;
    }//end case 0
    case 1:{ //this will execute if x = 1
        //do stuff
        break;
    }
    case 2:{ 
        //this will execute if x = 2
        //do stuff
        break; 
    }
    case 3:{ 
        //this will execute if x = 3
        //do stuff
        break;
    }
    default:{ 
        //this will happen if none of the other cases are true
        //do stuff
    }//end default
} //End switch

 

Cases don’t offer much in terms of functionality that you couldn’t have accomplished with just if / else statements. The primary advantage that you have with cases is structure and readability. You can look at a case and immediately tell what it is doing, whereas a complex if might take a lot more time / effort to comprehend.

Last modified: April 9, 2019

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