In the previous article we have discussed about Java Program to Compute (a/b)x where Value of a, b and x are Given

In this program we are going to see how to compute a^{(1/x)} where value of a and x is given by using Java programming language.

## Java Program to Compute a^(1/x) where Value of a and x is Given

The formula of a^{(1/x)} is given below.

a^{(1/x)} = ^{x}√a

Now we will convert this into a valid Java expression.

Let x= a^{(1/x)}

**Example:**

Suppose a=27 and x=3, Then a^(1/x) = 27^(1/3) = 3

Now let’s see different ways to compute a^{(1/x)}.

- By Using Static Input Value and Pow() Function
- By Using User Input Value and Pow() Function
- By Using User Defined Method

### Method-1: Java Program to Compute a^(1/x) where Value of a and x is Given By Using Static Input Value and Pow() Function

**Approach:**

- Declare and initialize two double variables say
`a`

and`x`

. - By using the formula compute a
^{(1/x)}. - Print the result.

**Program:**

import java.lang.Math; class Main { public static void main(String[] args) { //declare the first double variable with a value double a= 125; System.out.println("a= " +a); //declare the second double variable with a value double x= 5; System.out.println("x= " +x); //declare another double variable and assigned the formulated value to it. double res= Math.pow(a,1/x); System.out.println("a^(1/x)= "+Math.round(res)); } }

Output: a= 125.0 x= 5.0 a^(1/x)= 3

### Method-2: Java Program to Compute a^(1/x) where Value of a and x is Given By Using User Input Value and Pow() Function

**Approach:**

- Declare two double variables say
`a`

and`x`

. - Prompt the user to enter the values to the corresponding variables by using Scanner class.
- Then By using the formula compute a
^{(1/x)}. - Print the result.

**Program:**

import java.lang.Math; import java.util.Scanner; class Main { public static void main(String[] args) { //create object of scanner class. Scanner sc=new Scanner(System.in); System.out.print("a= "); //Declare an double variable and prompt the user to enter corresponding value to it. double a= sc.nextDouble(); System.out.print("x= "); //Declare another double variable and prompt the user to enter corresponding value to it. double x= sc.nextDouble (); //declare another double variable and assigned the formulated value to it. double res= Math.pow(a,1/x); System.out.println("a^(1/x)= "+Math.round(res)); } }

Output: a= 27 x= 3 a^(1/x)= 3

### Method-3: Java Program to Compute a^(1/x) where Value of a and x is Given By Using User Defined Method

**Approach:**

- Declare two double variables say
`a`

and`x`

. - Prompt the user to enter the values to the corresponding variables by using Scanner class.
- Then call a user defined method say
`computeValue()`

and pass`a`

and`x`

as parameter. - Then inside method by using the formula compute a
^{(1/x)}. - Print the result.

**Program:**

import java.util.Scanner; class Main { public static void main(String[] args) { //create object of scanner class. Scanner sc=new Scanner(System.in); System.out.print("a= "); //Declare an double variable and prompt the user to enter corresponding value to it. double a= sc.nextDouble(); System.out.print("x= "); //Declare another double variable and prompt the user to enter corresponding value to it. double x= sc.nextDouble (); //call the function computeValue(a,x); } //define the method public static void computeValue(double a, double x) { //declare another double variable and assigned the formulated value to it. double res= Math.pow(a,1/x); System.out.println("a^(1/x)= "+Math.round(res)); } }

Output: a= 1728 x= 3 a^(1/x)= 12

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