Code to Display all prime numbers in an intervals of C

Code to Display all prime numbers in an intervals of C

In this article, we will discuss the concept of Code to Display all prime numbers in an intervals of C

In this program, we are going to learn how to write the code to display prime numbers between two intervals using different methods in C language.

This is done using for loop , while loop , do-while loop and function in C language

Display prime numbers between two intervals

Display prime numbers between two intervals using for loops

In this program, we will print prime numbers between two intervals  using a for loop in C language

Program 1

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i,j,min,max;
    printf("Enter two number with intervals\n");
    scanf("%d %d",&min,&max);

    printf("Prime numbers %d to %d are\n",min,max);
    for(i=min; i<=max; i++){
        int count=0;
        for(j=1; j<=i; j++){
        if(i%j==0){
            count++;
        }
    }
    if(count==2){
        printf("%d ",i);
    }
    }
getch();
    return 0;
}

When the above code is executed, it produces the following result

Enter two number with intervals
20
80
Prime numbers 20 to 80 are:
23 29 31 37 41 43 47 53 59 61 67 71 73 79

 

Display prime numbers between two intervals using while loop

In this program, we will print prime numbers between two intervals  using a while loop in C language

Program 2

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i,j,min,max;
    printf("Enter two number with intevals\n");
    scanf("%d %d",&min,&max);

    printf("Prime numbers %d to %d are\n",min,max);
    i=min;
    while(i<=max){
        int count=0;
        j=1;
        while(j<=i){
        if(i%j==0){
            count++;
        }
         j++;
    }
    if(count==2){
        printf("%d ",i);
    }
     i++;
    }
getch();
    return 0;
}

When the above code is executed, it produces the following result

Enter two number with intervals
25
75
Prime numbers 25 to 75 are:
29 31 37 41 43 47 53 59 61 67 71 73

Display prime numbers between two intervals using do-while loop

In this program, we will print prime numbers between two intervals  using a do-while loop in C language

Program 3

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i,j,min,max;
    printf("Enter two number with intevals\n");
    scanf("%d %d",&min,&max);

    printf("Prime numbers %d to %d are\n",min,max);
    i=min;
   do{
        int count=0;
        j=1;
        do{
        if(i%j==0){
            count++;
        }
         j++;
    }while(j<=i);
    if(count==2){
        printf("%d ",i);
    }
     i++;
    } while(i<=max);
getch();
    return 0;
}

When the above code is executed, it produces the following result

Enter two number with intervals
30
50
Prime numbers 30 to 50 are:
31 37 41 43 47

Display prime numbers between two intervals using function

In this program, we will print prime numbers between two intervals  using a function in C language

Program 4

#include <stdio.h>
#include <stdlib.h>
int printPrime(int n);//function prototype
int main()
{
    int i,flag,min,max;
    printf("Enter two number with intervals\n");
    scanf("%d %d",&min,&max);

    printf("Prime numbers between %d to %d are\n",min,max);

   for(i=min+1; i<max; i++){
        flag=printPrime(i);//function call


        if(flag==1){

        printf("%d ",i);
    }

    }
getch();
    return 0;
}

int printPrime(int n){//function definition
int j,flag=1;
for(j=2; j<=n/2; j++){
    if(n%j==0){
        flag=0;
        break;
    }
}
return flag;
}

When the above code is executed, it produces the following result

Enter two number with intervals
50
100
Prime numbers 50 to 100 are:
53 59 61 67 71 73 79 83 89 97

 

Suggested post

for loop in C language

while loop in C language

do-while loop in C language

if statements in C language

function in C language

 

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