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What is the output of the following Java code? int a = 10; int b = a++ + ++a + a-- + --a; This question is required.*A43B44C42D45

Question

What is the output of the following Java code?

int a = 10;
int b = a++ + ++a + a-- + --a;

This question is required.*

  • A 43
  • B 44
  • C 42
  • D 45
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Solution

The output of the given Java code can be determined by understanding how the increment (++) and decrement (--) operators work in Java.

Here's the step-by-step breakdown:

  1. int a = 10; - This initializes the variable a with the value 10.

  2. int b = a++ + ++a + a-- + --a; - This line is a bit more complex due to the use of increment and decrement operators.

    • a++ - This is a post-increment operation. It means the current value of a (which is 10) is used in the expression, and then a is incremented by 1. So, after this operation, a becomes 11.

    • ++a - This is a pre-increment operation. It means a is incremented by 1 before it's used in the expression. So, a becomes 12, and this value is used in the expression.

    • a-- - This is a post-decrement operation. It means the current value of a (which is 12) is used in the expression, and then a is decremented by 1. So, after this operation, a becomes 11.

    • --a - This is a pre-decrement operation. It means a is decremented by 1 before it's used in the expression. So, a becomes 10, and this value is used in the expression.

So, the expression a++ + ++a + a-- + --a becomes 10 + 12 + 12 + 10, which equals 44.

Therefore, the output of the given Java code is 44 (Option B).

This problem has been solved

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