Skip to main content

Java Program To Check Whether Number is Prime Or Not

 Java Program To Check Whether Number is Prime Or Not

==================================================

// What is Prime Number?
// A number which is divisible by 1 and itself only then that number is
// considered to be Prime Number
// Example: 1) 3 is divisible by 1 and 3 only(It is having only two factors.)

import java.util.Scanner;

public class PrimeNumberOrNot {

    public static void main(String[] args) {

        // What is Prime Number?
        // A number which is divisible by 1 and itself only then that number is
        // considered to be Prime Number
        // Example: 1) 3 is divisible by 1 and 3 only(It is having only two factors.)

        Scanner sc = new Scanner(System.in);
        System.out.println("Enter the Number for checking out whether it is prime or not:");
        Integer number = sc.nextInt();

        // 0 and 1 are not a prime Numbers.

        Integer remainder = 0, count = 0;
        for (int i = 1; i <= number; i++) {
            remainder = number % i;
            if (remainder == 0) {
                count++;
            }
        }

        if (count == 2) {
            System.out.println(number + " is a prime Number");
        } else {
            System.out.println(number + " is not a prime number");
        }

    }

}



Output:
==========
Enter the Number for checking out whether it is prime or not:
79
79 is a prime Number

Labels:

Comments

Post a Comment

Popular posts from this blog

Java Programs Asked In An Interview | Java 8 | Core Java

 Q1) // Write a Java Program To Find Out the Character Occurnaces In A String. import java . util . HashMap ; import java . util . Map ; public class CharOccurnacesInString {     // Write a Java Program To Find Out the Character Occurnaces In A String.     public static void main ( String [] args ) {         String str = "I am Sandeep Aswar" ;         str = str . replaceAll ( " " , "" ). toLowerCase ();         char [] ch = str . toCharArray ();         Map < Character , Integer > charMap = new HashMap <>();         for ( char c : ch ) {             if ( charMap . containsKey ( c )) {                 charMap . put ( c , charMap . get ( c ) + 1 );             } else {                 charMap . pu...
Post a Comment
Read more

Java 8 Programs Asked In Interview For Experienced Professionals | Java 8 Coding Interview Questions Asked In The Interview.

 Q1) // Given Two Strings. Find Out the Two Strings are Anagrams or not.     // Anagram means a String which has same characters present with the another     // String,     // Only the sequence of the Characters are different. package J ava C oncept O f D ay ; import java . util . stream . Collectors ; import java . util . stream . Stream ; public class AnagramStrings {     // Given Two Strings. Find Out the Two Strings are Anagrams or not.     // Anagram means a String which has same characters present with the another     // String,     // Only the sequence of the Characters are different.     public static void main ( String [] args ) {         String str1 = "Listen" ;         String str2 = "Silent" ;         str1 = Stream . of ( str1 . split ( "" )). map ( String :: toLowerCase ). sorted (). collect ( Collectors . joining ());...
Post a Comment
Read more

How many primitive data types are there in Java?

Java includes a set of fundamental data types known as primitive data types. These data types are the essential components for storing and managing various kinds of data, including numbers, characters, and boolean values. Java encompasses a total of eight primitive data types, and this article aims to provide an in-depth explanation of each type in a simplified manner. 1.      byte: The byte data type is designed for storing small integer values, with a range spanning from -128 to 127. 2.      short: Slightly more accommodating than byte , the short data type can be employed for storing relatively larger integer values, ranging from -32,768 to 32,767. 3.      int: Among the most commonly used primitive data types, int can hold larger integer values, with a range extending to approximately -2 billion to 2 billion. 4.      long: When dealing with very large integer values, the long data t...
Post a Comment
Read more