JAVASCRIPT

how to find prime numbers in an array in javascript

// how to find prime numbers in an array in javascript
let num = [-1,-2,-3,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20];
let result = [];
function isPrime(num) {
  if(num < 2) return false;

  for (let k = 2; k < num; k++){
    if(num % k == 0){
      return false;
    }
  }
  return true;
}
num.forEach(function (element) {
  const item = isPrime(element);
  if (item) {
    result.push(element);
  }
});
console.log(result); // [ 2, 3, 5, 7, 11, 13, 17, 19]

array prime numbers

[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53]

how to find prime numbers in an array

#include <stdio.h>

//function to check number is prime or not
//function will return 1 if number is prime
int isPrime(int num)
{
	int i; //loop counter
	//it will be 1 when number is not prime
	int flag=0; 
	//loop to check number is prime or not
	//we will check, if number is divisible
	//by any number from 2 to num/2, then it
	//will not be prime
	for(i=2; i<num/2; i++)
	{
		if(num%i ==0)
		{
			flag =1;
			break;
		}
	}
	//flag is 1, if number is not prime
	if(flag==1)
		return 0;
	else
		return 1;
}

int main()
{
	int loop; //loop counter
	//declaring array with prime and not prime numbers
	int arr[]={100, 200, 31, 13, 97, 10, 20, 11};
	//calculate length of the array
	int len = sizeof(arr)/sizeof(arr[0]);
	
	//print array elements with message 
	//"prime" or "Not prime"
	for(loop=0; loop<len; loop++)
	{
		printf("%3d - %s
",arr[loop],(isPrime(arr[loop])?"Prime":"Not Prime"));
	}
	
	printf("
");
	
	return 0;	
}

how to find prime numbers in an array

#include <stdio.h>

//function to check number is prime or not
//function will return 1 if number is prime
int isPrime(int num)
{
	int i; //loop counter
	//it will be 1 when number is not prime
	int flag=0; 
	//loop to check number is prime or not
	//we will check, if number is divisible
	//by any number from 2 to num/2, then it
	//will not be prime
	for(i=2; i<num/2; i++)
	{
		if(num%i ==0)
		{
			flag =1;
			break;
		}
	}
	//flag is 1, if number is not prime
	if(flag==1)
		return 0;
	else
		return 1;
}

int main()
{
	int loop; //loop counter
	//declaring array with prime and not prime numbers
	int arr[]={100, 200, 31, 13, 97, 10, 20, 11};
	//calculate length of the array
	int len = sizeof(arr)/sizeof(arr[0]);
	
	//print array elements with message 
	//"prime" or "Not prime"
	for(loop=0; loop<len; loop++)
	{
		printf("%3d - %s
",arr[loop],(isPrime(arr[loop])?"Prime":"Not Prime"));
	}
	
	printf("
");
	
	return 0;	
}

how to find prime numbers in an array

#include <stdio.h>

//function to check number is prime or not
//function will return 1 if number is prime
int isPrime(int num)
{
	int i; //loop counter
	//it will be 1 when number is not prime
	int flag=0; 
	//loop to check number is prime or not
	//we will check, if number is divisible
	//by any number from 2 to num/2, then it
	//will not be prime
	for(i=2; i<num/2; i++)
	{
		if(num%i ==0)
		{
			flag =1;
			break;
		}
	}
	//flag is 1, if number is not prime
	if(flag==1)
		return 0;
	else
		return 1;
}

int main()
{
	int loop; //loop counter
	//declaring array with prime and not prime numbers
	int arr[]={100, 200, 31, 13, 97, 10, 20, 11};
	//calculate length of the array
	int len = sizeof(arr)/sizeof(arr[0]);
	
	//print array elements with message 
	//"prime" or "Not prime"
	for(loop=0; loop<len; loop++)
	{
		printf("%3d - %s
",arr[loop],(isPrime(arr[loop])?"Prime":"Not Prime"));
	}
	
	printf("
");
	
	return 0;	
}