Missing value in Java

Question

What is the statement that can be used in Java to represent a missing value of a variable. for instance I want to write a code:

if (a>=23)
 income = pay_rate;         


        

Answer 1

you could try this as well, maybe just the way I like to do it, but up to you :p

if(a >= 23){
    income = payRate;
} else{
    income = null;
}

rather than setting it to null by default, you set it to null after it checks what a is. also, make sure income is either an Integer or Double