FAQ: Learn Java: Manipulating Variables - Order of Operations

This community-built FAQ covers the “Order of Operations” exercise from the lesson “Learn Java: Manipulating Variables”.

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This exercise can be found in the following Codecademy content:

Build Basic Android Apps with Java

Learn Java

FAQs on the exercise Order of Operations

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The order of operations dictates the order in which an expression (like the one above) is evaluated.

The order should be as follows:

  1. Parentheses
  2. Multiplication, Division or Modulo, priority from left to right(4 % 3 * 5- 2 + 1 is equal to 5*(4 % 3) - 2 + 1)
  3. Addition or Subtraction, priority from left to right
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int expression3 = 5 * 4 % 3 - 2 + 1;

According to the result, the answer to this expression is 1. However, when I’ve calculated it, I’ve got the answer 4.

Can anyone explain how the above expression from this code works out to be 1? I am baffled, though admittedly rusty with the maths.

Many thanks,