Find a Number is Prime or not in C Language with Example

Find a Number is Prime or not in C Language with Example. 
C program to find a Number is prime or not. It is a simple source code that provides the output of an actual Prime number. Take care of a questions for your interviews or students exam. This is a totally free of cost code.

NUMBER IS PRIME OR NOT IN C
This C program is used find the given number is prime or not by using different statements like looping & unconditional statement. Check the entered value with condition of if(p_flag == 1). If it is satisfies the condition, then print a number as prime.  Otherwise it is not a prime number.


Q: Write a C program to check whether a given input value is Prime number or not.

//Header files
#include<stdio.h>
#include<conio.h>
//Global variable
int isPrime(int);
 
void main()
{
    //Program variables
    int cr,num,p_flag=0;
 
    clrscr(); //Function to clear previous output
    printf("Enter the value:"); //Display function
    scanf("%d",&num); //Getting input value function
}
int isPrime(num)
{
for(cr=2;cr<num/2;cr++) //Looping statement
{
    if(num%cr==0) //Conditional statement
    {
        p_flag=1;
        break;
    }
}
}
 
    if(p_flag == 1)
        printf("Number is not prime");
    else
        printf("Number is prime");
    getch();
}