Technology & Computing

By: Andrew HolderUpdated: January 23, 2021

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- Last UpdatedMay 17, 2022

- Description. The java.lang.Math.pow(double a, double b) returns the value of the first argument raised to the power of the second argument.
- Declaration.
- Parameters.
- Return Value.
- Exception.
- Example.

Similarly, it is asked, how do you use integers as a power function in Java?

What is the use of math POW in Java?

The **Math**. **pow**() is an built-in method in **Java Math** class and is **used** to calculate the power of a given number. The power of a number refers to how many times to multiply the number with itself.

How do you do powers without math POW in Java?

If you want to vary the exponent, you can **do** it in a loop: int MyPow(int base, int exponent) {

**Yes you can write your function for this,**

- double power(double d, int n){
- double p=1;
- for(int i=0;i<n;i++)
- p=p*d;
- return(p) ;
- }

How do you write a power of 2 in Java?

Math. pow() is used to calculate a number raise to the **power** of some other number. This function accepts two parameters and returns the value of first parameter raised to the second parameter.

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.

- 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;

- Widening
**Casting**(automatically) - converting a smaller type to a larger type size. byte -> short -> char -> int -> long -> float -> double. - Narrowing
**Casting**(manually) - converting a larger type to a smaller size type. double -> float -> long -> int -> char -> short -> byte.

Felix Albrigtsen. Answered October 17, 2017. The % operator in most modern programming languages, including **java**, means modulo. The modulo operator (A % B) returns the remainder from division(a divided by b).

- Widening Casting (automatically) - converting a smaller type to a larger type size. byte -> short -> char -> int -> long -> float -> double.
- Narrowing Casting (manually) - converting a larger type to a smaller size type. double -> float -> long -> int -> char -> short -> byte.

Description. The **java**.lang.**Math**.**sqrt**(double a) returns the correctly rounded positive **square root** of a double value. Special cases − If the argument is NaN or less than zero, then the result is NaN.

In **Java**, "**NaN**" stands for "not a number" and signifies that a value is not defined. "**NaN**" is not an exception error, but a value that is assigned. For example, imaginary numbers like the square root of negative numbers or zero divided by zero will both print "**NaN**" as the result.

- int x = 12;
- int y = 13;
- int z = x * y;
- System. out. println("Multiplication: " + z);