Revising Basic Java Concepts — Question 51

(1) Math.floor(-4.7)

Output

-5.0

Explanation

Math.floor method returns the largest double value that is less than or equal to the argument and is equal to a mathematical integer. As -5.0 is the largest mathematical integer less than -4.7 so it is the output. Note that -4.7 is a negative number so the largest integer less than -4.7 is -5.0 and not -4.0.

(2) Math.ceil(3.4) + Math.pow(2,3)

Output

12.0

Explanation

Math.ceil(x) function returns the smallest whole number greater than or equal to x. Math.ceil(3.4) gives 4.0 and Math.pow(2,3) gives 8.0. So the output is 4.0 + 8.0 = 12.0.