Question

I am getting the invalid assignment error when trying to parse two strings and them perform mathematical operations on them :S

the error is in this line,

                   IfirstValue+IfirstValue;

Here is the complete code,

firstValue = 34;
    secondValue = 10;

     IfirstValue = Integer.parseInt(firstValue);
               IsecondValue = Integer.parseInt(secondValue);

                   if (operator == 3){
                       IfirstValue+IfirstValue;
                   }

I tried replacing ‘+’ by ‘-‘ , ‘/’ , ‘*’ but the error remains same :S

(operator is input from the user)

please explain why it is happening.

Answer 1

Because you don’t assign the result of the expression. Try:

IfirstValue = IfirstValue+IfirstValue;

or

IfirstValue += IfirstValue;

Also, please avoid starting variable names with capital letters, it violates Java’s coding convention.