## Program to find all prime numbers from array

###### 2 years ago Admin 0

# Find all prime numbers from array

This article illustrates how to find all prime numbers from array in c/c++.

Here is the source code and output of both the programs.

**C Programming language**

#### Program

```
#include<stdio.h>
#include<conio.h>
void main()
{
int arr[20],size,i,j,n;
clrscr();
printf("Enter number of elements you want to enter in array:- ");
scanf("%d",&size);
printf("Enter elements in array:- ");
for(i=0;i<size;i++)
{
scanf("%d",&arr[i]);
}
printf("Prime numbers are :- \n");
for(i=0;i<size;i++)
{
n=0;
for(j=2;j<arr[i];j++)
{
if(arr[i]%j==0)
{
n++;
break;
}
}
if(n==0)
{
printf("%d \n",arr[i]);
}
}
getch();
}
```

#### After compiling and executing the above **C** program output is:-

**C++ Programming language**

#### Program

```
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int arr[20],size,i,j,n;
cout<<"Enter number of elements you want to enter in array:- ";
cin>>size;
cout<<"Enter elements in array:- ";
for(i=0;i<size;i++)
{
cin>>arr[i];
}
cout<<"Prime numbers are :- "<<endl;
for(i=0;i<size;i++)
{
n=0;
for(j=2;j<arr[i];j++)
{
if(arr[i]%j==0)
{
n++;
break;
}
}
if(n==0)
{
cout<<arr[i]<<endl;
}
}
getch();
}
```

#### After compiling and executing the above **C++** program output is:-

#### Comment below if you are facing any problem or you find any error in the above program and also subscribe to our newsletter for more updates.

#### Read more c/c++ Programs published by snapcout:-

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#### want to know what are prime numbers ?

**About article**

**Written By:- **Admin

**Published on:- **27/10/2017

**Published By:- **Snapcout

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