Question

What is the result of evaluating the following expression? ( 1/2 + 3.5) * 2.0

The result is 7

I need explain.

Answer 1

(1/2+3.5)*2.0

First 1/2 implies performing division on two integers so 1/2 will always gives 0 instead of 0.5. Suppose if you need 0.5 either numerator or denominator should be converted to real number ie., float or double

For example if you want to convert either numerator or denominator to float

1/2===>(float)1/2 or 1/(float)2 (type casting)=0.5

so here 1/2 will always be 0

and parenthesis is having highest priority than all other operators so 1/2+3.5 will be evaluated first and result obtained will be multiplied with 2.0

(1/2+3.5)==>(0+3.5)=3.5 (result will be real number)

so 3.5*2.0 = 7 is answer