# What is magic number in Java program?

## What is magic number in Java program?

If the single digit is 1 then the number is called a magic number. It is quite similar to the happy number. For example, 325 is a magic number because the sum of its digits (3+2+5) is 10, and again sum up the resultant (1+0), we get a single digit (1) as the result. Hence, the number 325 is a magic number.

What is magic numbers in programming?

In programming, a magic number is a constant value used to identify a file format, protocol or error code. In many file formats, the first few bytes identify the file; for example, “PK” in ZIP files and the hex values “F8 D8” in JPEG files.

### Is 145 a magic number?

145 is a Magic number 2. Another way of checking whether a given number is Magic number or not is given below.

What is harshad number in Java?

Java Numbers: Exercise-12 with Solution In recreational mathematics, a harshad number in a given number base, is an integer that is divisible by the sum of its digits when written in that base. Example: Number 200 is a Harshad Number because the sum of digits 2 and 0 and 0 is 2(2+0+0) and 200 is divisible by 2.

#### How 1729 is a magic number?

It is 1729. Discovered by mathemagician Srinivas Ramanujan, 1729 is said to be the magic number because it is the sole number which can be expressed as the sum of the cubes of two different sets of numbers. Ramanujanâ€™s conclusions are summed up as under: 1) 10 3 + 9 3 = 1729 and 2) 12 3 + 1 3 = 1729.

What is Krishnamurthy number in Java?

Krishnamurthy number is another special number in Java. A number is said to be Krishnamurthy if the factorial sum of all its digits is equal to that number. Krishnamurthy number is also referred to as a Strong number.

## What number is Kaprekar?

6174 is known as Kaprekar’s constant after the Indian mathematician D. R. Kaprekar.

How to get Tomcat version number in Java?

open the terminal or cmd.

• go to the[tomcat-home]\\bin directory. ex: c:\\tomcat8\\bin
• write the following command: Tomcat8W//ES//Tomcat8
• will open dialog,select the java tab (top pane).
• change the Java virtual Machine value.
• click OK.
• ### How to get a random integer in Java?

Introduction.

• Random.ints () We’re starting off with Random.ints () which was added to the Random class in Java 8,exactly for this purpose.
• Random.nextInt () A more classic example that you’ll oftentimes see people using is simply utilizing the Random.nextInt () method.
• What is magic code in Java?

Algorithm for Magic Number. Step 1: Take two variables,sum for storing a sum of square and number for holding the value.

• Example to find Magic Number
• Another Example To find Magic Number. There is another approach to find Magic Number. In this approach,we can get Magic Number after dividing a number by 9.
• #### How to handle big numbers in Java?

BigInteger abs (): This method returns a BigInteger whose value is the absolute value of this BigInteger.

• BigInteger add (BigInteger val): This method returns a BigInteger whose value is (this+val).
• BigInteger and (BigInteger val): This method returns a BigInteger whose value is (this&val).