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javatype-promotion

Promotion in java

I exectued this statement

System.out.println(3.0 + 5/2);

And found the answer to be 5.0. Now according to promotion, if an expression contains a double type data, every operand will be promoted to double type. So 5 and 2 will be promoted to 5.0 and 2.0 respectively. Therefore the logical expression here should be 

3.0+5.0/2.0

Which should give the answer 5.5 instead of 5.0.

Solution

  • It's important to remember the order of operations!

    3.0 + 5/2
3.0 + (5/2)
3.0 + 2
3.0 + 2.0
5

    5/2 executes first, giving back 2.

    Hope this helps!