## How do you take the cube root in Java?

Math. cbrt() method is used to find the cube root of a double value in JAVA for the given input ( x – parameter). For positive finite x, cbrt(-x) == -cbrt(x); that is, the cube root of a negative value is the negative of the cube root of that value’s magnitude.

## How do you find the perfect cube in Java?

Method 1: Naive Approach

The idea is to check for each number from 1 to N if the cube of any of these numbers equals N. If so, then that number is the cube root of N and the N is a perfect cube.

## How do you power something in Java?

Math. pow(double a, double b) returns the value of a raised to the power of b . It’s a static method on Math class, which means you don’t have to instantiate a Math instance to call it. The power of a number is the number of times the number is multiplied by itself.

## How do you get input in Java?

Example of integer input from user

- import java.util.*;
- class UserInputDemo.
- {
- public static void main(String[] args)
- {
- Scanner sc= new Scanner(System.in); //System.in is a standard input stream.
- System.out.print(“Enter first number- “);
- int a= sc.nextInt();

## How do you multiply pi in Java?

To get the area, we need to multiply pi times the radius squared.

…

An Example

- import java. lang. Math. *;
- public class Pie {
- public static void main(String[] args) {
- //radius and length.
- double radius = 5;
- double len = 15;
- // calculate the area using PI.
- double area = radius * radius * Math. PI;

## How do you figure out cube roots?

Set up the problem.

- Write down the number whose cube root you want to find. Write the digits in groups of three, using the decimal point as your starting place. …
- Draw a cube root radical sign over the number. …
- Place a decimal point above the bar line, directly above the decimal point in the original number.

## What is a perfect cube?

A perfect cube is a number that is the cube of an integer. For example, 125 is a perfect cube since 125 = 5 × 5 × 5= 53. Some examples of perfect cubes are 1, 8, 27, 64, 125, 216, 343, ..

## How do you find the perfect cube between two numbers?

Method 2 (Efficient): We can simply take cube root of ‘a’ and cube root of ‘b’ and Round cube root of ‘a’ up and cube root of ‘b’ down and count the perfect cubes between them using: (floor(cbrt(b)) – ceil(cbrt(a)) + 1) We take floor of cbrt(b) because we need to consider numbers before b.

## How do you write a perfect cube number?

Numbers like 23 = 8, 33 = 27, 43 = 64, then the numbers 8, 27, 64 are termed as perfect cubes.

…

Perfect Cubes of First 50 Natural Numbers are as Follows:

- 1 = 1 x 1 x 1 = 13.
- 8 = 2 x 2 x 2= 23.
- 27 = 3 x 3 x 3= 33.
- 64 = 4 x 4 x 4 = 43.
- 125 = 5 x 5 x 5 = 53.
- 216 = 6 x 6 x 6= 63.
- 343 = 7 × 7 × 7 = 73.
- 512 = 8 × 8 × 8 = 83.

## How do you write 10 to the power 9 in Java?

Since 109 fits into an int and is also exactly representable as a double , you can do this: int exp = (int) Math. pow(10, 9); BigInteger answer = BigInteger.

## What is print () in Java?

print(): print() method in Java is used to display a text on the console. This text is passed as the parameter to this method in the form of String. This method prints the text on the console and the cursor remains at the end of the text at the console. The next printing takes place from just here.

## How do you square something in Java?

Squaring a number in Java can be accomplished in two ways. One is by multiplying the number by itself. The other is by using the Math. pow() function, which takes two parameters: the number being modified and the power by which you’re raising it.

## What is nextLine () in Java?

The java. util. Scanner. nextLine() method advances this scanner past the current line and returns the input that was skipped. This method returns the rest of the current line, excluding any line separator at the end.

## What is scanner in Java?

Scanner is a class in java. util package used for obtaining the input of the primitive types like int, double, etc. and strings. It is the easiest way to read input in a Java program, though not very efficient if you want an input method for scenarios where time is a constraint like in competitive programming.