Question

Now we’ll use some of the Math class functions. If the answer should be a floating-point type, be sure to include a decimal point or it will be counted wrong.

type abs (type) – the absolute value, which means if it’s positive, it just returns the same number, but if it’s negative, it strips off the negative sign and then returns that number. If the argument is an integer, it returns an integer. If it’s a long, it returns a long. If it’s a double, it returns a double. If it’s a float, it returns a float.

abs (5) = 5, abs (- 5) = 5, abs (0) = 0, abs (12.4) = 12.4, abs (-12.4) = 12.4

1. abs (7) =
2. abs (-7) =
3. abs (0) =
4. abs (-3.4) =

double floor (double a) – Returns the largest double value that is less than or equal to the argument and is equal to a mathematical integer. Note that for negative arguments, it is still less than or equal to. Also note that it returns a double, NOT an integer.

Examples: floor (3.7) = 3.0, floor (-4.8) = -5.0

5. floor (2.5) =
6. floor (-8.6) =
7. floor (4.0) =

double ceil (double) – Returns the smallest (closest to negative infinity) double value that is greater than or equal to the argument and is equal to a mathematical integer.

Examples: ceil (4.6) = 5.0, ceil (-3.4) = -3.0

8. ceil (7) =
9. ceil (5.0) =
10. ceil (-4.3) =

Answer 1

abs:
-------
abs (7) = 7
abs (-7) = 7
abs (0) = 0
abs (-3.4) = 3.4

floor:
--------
floor (2.5) = 2.0
floor (-8.6) = -9.0
floor (4.0) = 4.0

ceil:
------
ceil (7) = 7.0
ceil (5.0) = 5.0
ceil (-4.3) = -4.0