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/* Program to print prime numbers up to given number */
import java.util.*;
public class Prime
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
System.out.println("Enter the number : (it prints prime numbers upto your given number)");
int n=sc.nextInt();
System.out.println("The Prime number upto "+n+" are : ");
while (n>=0)
{
int count=0;
for (int i=1;i<=n ;i++)
{
if (n%i==0)
{
count++;
}
}
if (count==2)
{
System.out.print(n+" ");
}
n--;
}
}
}
/*To find whether a number is prime or not (simplest program)*/
import java.io.*;
class PrimeOrNot
{
public static void main() throws IOException
{
InputStreamReader ir = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(ir);
System.out.println("Enter the number");
double n = Double.parseDouble(br.readLine());
System.out.println();
int k, l=0;
for (k=1; k<=n; k++)
{
if(n%k==0)
{
l=l+1;
}
}
if(l==2)
{
System.out.println();
System.out.println(n+" is a prime number");
}
else
{
System.out.println();
System.out.println(n+" is NOT a prime number");
}
}
}
import java.util.*;
class Prime
{
public static void main(String s[])
{
int a,c=0;
Scanner sc=new Scanner(System.in);
System.out.println("enter a number");
a=sc.nextInt();
for(int i=1;i<=a;i++)
if(a%i==0)
c++;
if(c==2)
System.out.println("prime number");
else
System.out.println("not a prime number");
}
}
class Prime{
public static void main(String args[]){
int flag=0;
int n=Integer.parseInt(args[0]);
for(int i=1;i<=n;i++){
if(n%i==0)
flag++;
}
if(flag==2)
System.out.println("It is prime");
else
System.out.println("It is not prime");
}
}
int n=<desired number>;
int i=2; // using 2 because every no is divisible by 1
boolean prime=false;
loop : while(i<n){
if(n%i==0){
prime = true;
break loop;
}
i++;
}
System.out.println(prime); // prints true if no is prime, false if it's not
A single input (the number) would look something like...
public static void main(String args) {
try {
// Get an integer
int num = Integer.parseInt(args)
// Must divide by something... start at two
int denom = 2;
// Keep dividing by larger numbers until there's no remainder
// or there's nothing left to try.
// Could probably stop even sooner, but just a sample answer
while(num % denom != 0 && denom < num){
denom++;
}
// If the while loop finished early, it's Optimus!
if(denom < num) {
System.out.println("We have a prime!");
} else {
System.out.println("Not prime... must be Megatron");
}
} catch (ParseException pe) {
System.out.println("Not prime; only integers can be prime. Input an integer number.");
}
}
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Write a c program to find out the prime numbers between 1 to 500?
To write a C program to find prime numbers between 1 to 500, you can use a nested loop structure. In the outer loop, iterate from 2 to 500, and in the inner loop, check if the number is divisible by any number from 2 to the square root of the number. If it is not divisible by any number other than 1 and itself, then it is a prime number. Print out all prime numbers found within the specified range. Remember to include necessary header files, such as <stdio.h>, and use appropriate logic to implement the program efficiently.
How can you Write a suitable pseudo code to check whether a number is prime or not?
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Write a c program to check whether a no is prime or not?
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Prime number program in C using recursion?
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Shell program for finding prime number?
#!/bin/sh i=2 rem=1 echo -e "Enter a number: \c" read num if [ $num -lt 2 ]; then echo -e "$num is not prime\n" exit 0 fi while [ $i -le `expr $num / 2` -a $rem -ne 0 ]; do rem=`expr $num % $i` i=`expr $i + 1` done if [ $rem -ne 0 ]; then echo -e "$num is prime\n" else echo -e "$num is not prime\n" fi
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Write your own prime number program and find out.
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see the program
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First write a program to generate the prime number. After one prime number was generated, divide the big int number by the prime number. If the remainder is zero then quotient is the second prime number ( also it is important to check whether the quotient is prime number or not because sometimes you will get wrong answer). Repeat the process until you get the result.
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There are several shell programs available for download on the Internet that will generate prime numbers. The best way to find a prime number is through calculation, however.
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The easiest, but not the most efficient way, to program this is to take your number "n" and test all the numbers from 2 to n-1 to see if they divide n, if none of them do, then n is prime.
How can I write a program to display prime numbers from 1 to 100?
Write a function that implements an algorithm that checks to see if a particular integer is prime (returning a boolean). Write a program that uses that function on each number from 1 to 100, and if true, displays that number.
