**Contents**show

## How do you find the square root of a number in Java?

Java sqrt() method with Examples

Math. sqrt() returns the square root of a value of type double passed to it as argument. If the argument is NaN or negative, then the result is NaN. If the argument is positive infinity, then the result is positive infinity.

## What is the formula for a square root?

The square root formula is used to find the square root of a number. We know the exponent formula: **n√x x n = x ^{1}^{/}^{n}**. When n= 2, we call it square root. We can use any of the above methods for finding the square root, such as prime factorization, long division, and so on.

## How do you implement a square root in Java?

**Method 1: Java Program to Find the square root of a Number using java.** **lang.** **Math.** **sqrt() method**

- If parameter x is positive double value, this method will return the square root of x.
- When x is NaN or less than zero, this method will return NaN.

## What is the formula of a2 b2?

a2 – b2 = **(a + b)(a – b )** .

## How do you write an algorithm for Square?

Explanation: Algorithm is as follows: **Divide the number in two parts with one part containing only the number at unit’s place say part ‘A’, and other part say ‘B’, containing the remaining number**. Now square the number at unit’s place. The square will be one of these; {0,1,4,9,16,25,36,49,64,81}.

## What is NaN in Java?

“NaN” stands for “**not a number**”. “Nan” is produced if a floating point operation has some input parameters that cause the operation to produce some undefined result. For example, 0.0 divided by 0.0 is arithmetically undefined. Finding out the square root of a negative number too is undefined.

## How do you cast type in Java?

**In Java, there are two types of casting:**

- 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.