Do exponents in java

How to do Exponents in Java?

As a beginner, we often struggle to calculate the exponent of a number while doing Java programming.

In Java, we don’t have any direct operator for finding exponents. The most convenient way to calculate the exponent in Java is by using Math.pow() function.

In this Java tutorial, you will learn two different ways to calculate exponents in Java with code examples.

1. Calculate exponent using Java for-loop

Basics are the building block for any programming language. So, we can simply use a for-loop and make our own logic in Java. Below is a Java program to do exponent of a number without Math.pow().

public class CalculateExponent1 < public static void main(String[] args) < //calculating exponent using for loop int base=5; int power=3; int result=1; if(power!=0)< for(int i=1;i<=power;i++) < result*=base; >> System.out.println(base + " raise to " + power + " maths.pow-to-do-exponent-in-java">2. Java Math.pow() method to do exponents in Java
Java provides an inbuilt method to directly do exponents i.e Math.pow(). The method simply accepts two parameters. Most importantly the two parameters must be of double type.
exponents in java Math.pow() method
Therefore, it is the most straightforward way of finding exponents in java. 
The method returns the first parameter raised to the second parameter.
In addition, there are certain cases that programmers should know while using Math.pow() Java function.

  
Firstly, If the second parameter is 0, the output will be 1.0
  
Secondly, If the second parameter is 1.0, the output will be the first parameter.
  
Finally, The result will be NaN if the second parameter is NaN.

Code Examples to calculate exponent in Java-
public class CalculateExponent < public static void main(String[] args) < double base=3; double power=6; Double result=0.0; result=Math.pow(base, power); System.out.println("result padding-left: 40px;">Case 1: Java Exponent when the second parameter is 0.
Double result=0.0; result=Math.pow(9, 0);//when second parameter=0,result=1.0 System.out.println("result padding-left: 40px;">Output
result = 1.0
 
Case 2:Java Exponent when the second parameter is 1.0
 
 Double result=0.0; result=Math.pow(3, 1); System.out.println("result padding-left: 40px;">Output
result = 3.0 
 
Case 3:Java Exponent when the second parameter is NaN.
 
 Double result=0.0; result=Math.pow(3, Double.NaN);//when NaN System.out.println("result padding-left: 40px;">Output
result = NaN 
 
Changing the result of exponent from double to an integer type
 
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How to do Exponents in Java
 
 
Java offers multiple ways to calculate an exponent for example the Math.pow() method, for-loop, and while loop. All these approaches can be used to find the power of a number however, it is preferred to use the pow() method for calculating the exponents . Because the Math.pow() method can calculate the power of any value i.e. positive, or negative. Moreover, the Math.pow() method saves a lot of time as there is no need to define any user-defined logic.
 
This post will explain how to do exponents using the below-listed approaches:
 
So, let’s get started with the practical implementation of the above-given approaches.
 
How to Get an Exponent Using Math.pow() in Java?
 
Built-in methods always come up with ease, and so does the Math.pow() method. It is a predefined Java method of Math class that takes two numeric values as an argument. The Math.pow() method returns a value which is a result of first number raised to the power of the second number.
 
We’ll take a look at the below-given snippet to understand the basic syntax of the Math.pow() method in Java:
 
Here in the above snippet, “Math” is a built-in Java class. The pow() is a predefined method of Math class. While the base and exponent are two parameters of the pow() method.
 
Now without wasting any time let’s directly jump into the practical implementation of the Math.pow() method in Java.
 
Example: How to do exponents in Java using the Math.pow() method
 
double num1 = 5 ; 
double num2 = 3 ; 
System. out . println ( "Result: " + Math . pow ( num1 , num2 ) ) ;
 
In this coding example, the Math.pow() method accepted two numeric values i.e. 5 and 3. Consequently, it will return the result as 5 raised to the power 3:
 
 
The resultant output shows the appropriateness of the Math.pow() method in Java.
 
How to Find the Exponent Using the While Loop in Java?
 
We can utilize the while loop to find the exponent in Java. Let’s take a look at the below-given snippet to learn how to find the exponent using the while loop in Java:
 
double base = 3 ; 
double power = 7 ; 
int count = 1 ; 
while ( power != 0 ) { 
count *= base ; 
power --; 
} 
System. out . println ( "Result: " + count ) ;
 
In this example program, we utilized the while loop to find the exponent. To do that, we specified a condition within the while loop i.e. “power != 0”. Within the while loop, we multiplied the “count” with the “base” value, which will keep multiplying until the condition remains true. The value of “power” will be decremented by 1 in each iteration, and this process will continue until the value of “power” becomes 0.
 
 
The output clarified that the while loop provides the appropriate results. Similarly, Java for-loop can be used to calculate the power of a number.
 
How to Get the Power of Negative Numbers in Java?
 
The Math.pow() method is equally effective for negative numbers as for positive numbers. This means we can utilize the Math.pow() method to find the power of a negative value. So, let’s do it!
 
double num1 = - 5 ; 
double num2 = 5 ; 
System. out . println ( "Result: " + Math . pow ( num1 , num2 ) ) ;
 
In this example we utilized the pow() method to find the power of a negative value. The above piece of code will produce the below-given output:
 
 
The output shows that the Math.pow() method works fine on the negative values.
 
Conclusion
 
In Java, an exponent can be calculated using the built-in Java method named Math.pow(), for-loop, and while loop. However, it is preferred to use the pow() method for calculating the exponents because it can calculate the power of any value i.e. positive, or negative. This post considered some examples to explain how to calculate the power in Java.
 
About the author
 
Anees Asghar
 
I am a self-motivated IT professional having more than one year of industry experience in technical writing. I am passionate about writing on the topics related to web development.
 
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What is Java Exponent? How to do exponents in Java?
 
 
Exponent is a simple mathematical term, which we have done in our childhood. There are a base number & power of that number provided. And we have to multiply the base number by itself, the same number of times as the power.
 
Let’s take an example 
 
If the base number is 5 & the power of the base number is 2. Then the exponent of that number will be 25. That means we have multiplied 5 two times. This is the process of getting exponents.
 
Now, one question may arise in mind why do we need exponents in Java?
 
Let’s assume one situation:
 
In a program, if a user finds the base is 2 & power is also 2. Then it will be an easy calculation. The user will do 2*2 & provide the output.
 
But when you have to calculate the exponent where the base is 8 & power is 7. Then it is not applicable to do 8*8*8*8*8*8*8. Writing codes in such a manner will hamper the beauty of that code.
 
So what to do in these scenarios?
 
In these cases, java exponentiation performs a big role. The only solution is to take the help of Java exponents.
 
But, is this thing can be implemented? Yes, very easily! Also, if you guys are looking to get help with Java Assignments or Programming then you can use our Java Homework Help Services.
 
What is Java Exponent? Know all about exponents in Java.
 
 
“What is Java Exponent” is a very basic question. Like other programming languages, Java does not have an exponent operator. In the C programming language, we have an exponent operator. Whereas in Java there is a package & a method to perform it.
 
We have already visualized that the exponent performs a great job in programming. In Java, we have a method to complete this task. This method follows the same algorithm which we used to do in our childhood.
 
For performing this method, we need to import one necessary package. This is Java. lang.Math. This package not only performs the exponents but also helps to find the maximum & minimum numbers, find the average of given numbers, etc.
 
How to do exponents in Java?
 
After knowing What is Java Exponent, it is time to know the ways to implement Java Exponent.
 
To implement Exponents in Java, there are mainly two ways:
 
In between these, using the pow() method will be a simpler one. Whereas, using a loop will be a difficult one. Also, it will consume more space & time, which is not good from the view of the algorithm.
 
Let us know each method one by one.
 
Exponents in Java using the pow() method?
 
At first, we will take inputs from the users using the scanner method. We will take the base value & the power as input.
 
In the pow() method, two arguments we have to pass. One is the base number & another is the power of that number. The first argument is the base number. The second argument is power.
 
By default pow() method returns the double type. But we can typecast it to the Integer value.
 
General syntax is: Math.pow(base, power);
 
import java.util.Scanner; import java. lang.Math; public class Exponents < public static void main(String[] args) < // Creating One Scanner Object To Input The Data Scanner myObj = new Scanner(System.in); // Declaring Two Integer variables int base,power; // taking Base Value System. out.println("Enter Base"); base = myObj.nextInt(); // Taking Power value System. out.println("Enter Power"); power = myObj.nextInt(); // Double Result or Result In Floating Value double result1 = Math.pow(base, power); System. out.println("Floating Value Result: "+result1); // Providing One Gap In Between Two Results System.out.println(); // Type Casting To Integer Result int result2 = (int)Math.pow(base, power); System. out.println("Type Casting Value Result: "+result2); >>
 
Let’s look at the output of the above code. Hence, we come to know how to do exponents in Java
 
 
 
Now let’s move forward with the other way to calculate the Java exponentiation. Still didn’t understand the coding part or are stuck in your coding assignment, you can hire the best programming assignment help services to get your programming task done.
 
How to implement an exponent in Java using a loop?
 
In this process, we have to first take the base value & the power value from the users.
 
Then we have to run a For Loop or While Loop. This loop will run until it reaches the power value.
 
In every iteration of the loop, we have to multiply the base by itself. This multiplication will complete with the help of another third variable. Also, if you want to learn about the exponential operator in Java you can get more information.
 
Then as usual we will first print the float number value.
 
Then we will type and cast it to the integer value.
 
import java.util.Scanner; public class ExponentsLoop < public static void main(String[] args) < // Creating One Scanner Object To Input The Data Scanner myObj = new Scanner(System.in); // Declaring Two Integer variables int base, power, i; double result=1; // taking Base Value System. out.println("Enter Base"); base = myObj.nextInt(); // Taking Power value System. out.println("Enter Power"); power = myObj.nextInt(); // Starting The Loop For Calculating The Exponential for(i=0;i // Multiplying The Base With Itself result=result*base; >// Double Result or Result In Floating Value System. out.println("Floating Value Result: "+result); // Providing One Gap In Between Two Results System.out.println(); // Type Casting To Integer Result int result1 = (int)result; System. out.println("Type Casting Value Result: "+result1); > > Let's look at the output of the above code. Hence, we come to know how to do exponents in Java
 
Output for exponent implementation using loop 
 
 
It is suggested to move only with the pow() method. Using the loop method will increase the space & time consumption of the code. That will affect the efficiency of the code.
 
Playing With Exponents: Learn different methods 
 
Though it is not related to what is java exponent, still these methods play an important role.
 
Along with the pow() method, there are many other methods. These methods help to reduce the work related to the power of any base numbers.
 
We can list down these methods:
 
This method returns the Euler’s Number.
 
It has general syntax as Math. exp(num);
 
This means if the user provides Math. exp(2), it will consider it as e 2.0
 
As the name suggests, it helps to find out the square root of any number.
 
It has general syntax as Math.sqrt(num);
 
This means, that if the user provides Math. sqrt(4), it will square root the number 4 & return the result.
 
Conclusion: 
 
As we saw exponentials are very important in our daily use.
 
When you will move towards difficult calculations, exponents in Java will help you much.
 
If in the future, you stuck to remembering the syntax & formulas. You just try to remember, “What is java exponent”. It will help a lot.
 
If you are looking for Final Year Java Project Ideas then you can contact us as well. If you are curious to learn other topics on Java then we have written some useful and detailed articles on the below topics:
 
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