# Write a java program to print all the prime numbers from 1 to 100

Write a program called PensionContributionCalculator that reads the monthly salary and age in int of an employee. Your program shall calculate the employee's, employer's and total contributions in double ; and print the results rounded to 2 decimal places.

It's one of the most common coding exercises for programmers learning in Java, as it gives you an opportunity to learn more about essential operator in Java Programming.

The key here is that you cannot use a library function which can simply your job, you need to devise the algorithm for checking prime number by yourself. We'll first write a function to check whether a number is prime or not and then we loop through first numbers i.

How to check if a number is prime or not A number is said to be prime if it's not divisible by any number other than itself e. You can do that check by using modulus operator in Java, which return zero if a number is perfectly divisible by another number.

If the number you are checking is not divisible by anyone then it's a prime number otherwise, it's not a prime number. But this logic can be further optimized to only loop through the square root of the number instead of the number itself, as shown in below example.

Program to display first prime numbers To display the first prime numbers, you can either enter n value as in the above program OR write a program like this. Dec 11,  · A Java program to print the sum of all prime numbers between 1 and * This Java program calculates and prints the sum of all prime numbers * between 1 and The number which is only divisible by itself and 1 is known as prime number. For example 2, 3, 5, 7 are prime numbers. Here we will see two programs: 1) First program will print the prime numbers between 1 and 2) Second program takes the value of n (entered by user) and prints the prime numbers between 1 and n.

This will make the Java program fast for checking large prime numbers. Here is a list of all prime numbers between 1 and Prime numbers from 1 to 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 That's all about how to print prime numbers in Java from 1 to Let me know if you find any bug on this program or you think if this program will not work in any specific scenario.

This looks much more optimized than looping till the number itself.

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Here are couple of more coding problems for practice: Top 10 Programming problems from Java Interviews?print prime numbers in java Program to print prime numbers in java - InstanceOfJava This is the java programming blog on "OOPS Concepts", servlets jsp freshers and 1, 2,3 years expirieance java interview questions on java with explanation for interview examination.

Aug 02,  · Many prime numbers are found to be on either side of the multiples of 6 and also those should not be divisible by 5.

Formula - let n be the prime number, 6n+1, 6n-1 Status: Resolved.

In JavaScript write a program that will print all the prime numbers between 1 and You will need to use looping and functions. (You can print the prime numbers in HTML or place them in a variable then display with an alert () function).

Dec 11,  · A Java program to print the sum of all prime numbers between 1 and * This Java program calculates and prints the sum of all prime numbers * between 1 and Jan 23,  · Step1. First create a function for print numbers.

## Java - Printing prime number from 1 to - Stack Overflow

function printnumbers(){ for (i=1; i; i++){ ashio-midori.com(i); } } printnumbers();. Modify the above program (called RunningNumberSquareSum) to find the sum of the square of all the numbers from 1 to , i.e. 1*1 + 2*2 + 3*3 + (Hint: Modify the sum = sum + .

What are all the prime numbers from