Big Java: 2

Question 1

how to make it so that the value of a variable is never changeable?

Answer 1

in the declaration, precede the type with the word “final”

Question 2

the three different types of delimiters (allow comments)

Answer 2

/** this program does etc */
/* this part does */
//this delimeter only end till end of this line

Question 3

if we want an exact quotient, make sure that when dividing, at least one of the numbers is

Answer 3

a double

Question 4

when two integers are divided…

Answer 4

the result is rounded down (the remainder is discarded)

Question 5

how to compute x^n

Answer 5

Math.pow(x, n)

Question 6

how to round to the closest integer to x

Answer 6

Math.round(x)

Question 7

how to take the absolute value of x

Answer 7

Math.abs(x)

Question 8

how to take the larger or smaller value from x and y

Answer 8

Math.max(x, y)

Math.min(x, y)

Question 9

how to display a variable with two places after the decimal point

Answer 9

System.out.printf( “%.2f”, variablenamehere );