C program to display all even or odd number from 1 to n

C program to display all even or odd number from 1 to n

In this tutorial, we will discuss the C program to display all even and odd  number from 1 to n

In this program, we are going to learn about how to find  odd or even numbers from 1 to given number using the loops in the C language

What is Even or Odd

When the number is divided by 2 and the balance becomes zero and the above number is called as the even number – eg 2,4,6,8,10

and on the other sides when it is divided by 2 and balance becomes 1 they are called odd numbers or uneven numbers

In my previous post, I have explained the various ways to check whether the  number is even or odd in C language

Once this program received the number it will check the given number either odd or even number of given range using loops.

After receiving the input from the user, it is stored in the variable of num and then program divides the value of num by 2 and displays the output.

Here, we can use modular operator

Example for C program to display all even number from 1 to n

Print all even number using for loop

In this program, we  print all even numbers from 1 to n using for loop

Program 1

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

int main()
{
    int i,num;
    printf("Print all even number until\n");

    scanf("%d",&num);//Reads input from user and store in variable num
    printf("Even number from 1 to %d are\n",num);

    for(i=1; i<=num; i++){//loop for iterates from 1 to maximum
        if(i%2==0)
        {
            printf("%d\n",i);
        }

    }
    return 0;
}

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

Print all even number until
50
Even number from 1 to 50 are
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50

 

Program 2

In this program, we  print all odd numbers from 1 to n using for loop

Print all odd number using for loop

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

int main()
{
    int i,num;
    printf("Print all odd number until\n");

    scanf("%d",&num);//Reads input from user and stored in variable num
    printf("Odd numbers from 1 to %d are\n",num);

    for(i=1; i<=num; i++){//loop for iterates from 1 to maximum
        if(i%2==1)
        {
            printf("%d\n",i);
        }

    }
    return 0;
}

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

Print all odd  number until
50
Odd number from 1 to 50 are
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49

 

Program 3

In this program, we print all even number from 1 to n using the while  loop

Print all even number using the while loop

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

int main()
{
    int i,num;
    printf("Print all even number until \n");
    scanf("%d",&num);//Reads input from user and stored in variable num
    printf("Even number from 1 to %d are\n",num);

    i=1;
    while(i<=num){//loop for iterates from 1 to maximum
        if(i%2==0)
        {
            printf("%d\n",i);
        }
        i++;
    }
getch();
    return 0;
}

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

Print all even number until
50
Even number from 1 to 50 are
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50

 

Program 4

In this program, we print all odd number from 1 to n using the while loop

Print  all odd number using while loop

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

int main()
{
    int i,num;
    printf("Print all odd number until \n");
    scanf("%d",&num);//Reads input from user and stored in variable num
    printf("Odd number from 1 to %d are\n",num);

    i=1;
    while(i<=num){//loop for iterates from 1 to maximum
        if(i%2==1)
        {
            printf("%d\n",i);
        }
        i++;
    }
getch();
    return 0;
}

 

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

Print all odd  number until 
50
Odd number from 1 to 50 are
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49

 

Program 5

In this program, we  print all even number from 1 to n using the do-while loop

Print  all even number using do -while loop

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

int main()
{
    int i,num;
    printf("Print all even number until \n");
    scanf("%d",&num);//Reads input from user and stored in variable num
    printf("Even number from 1 to %d are\n",num);

    i=1;
    do{//loop for iterates from 1 to maximum
        if(i%2==0)
        {
            printf("%d\n",i);
        }
        i++;
    }
    while(i<=num);
getch();
    return 0;
}

 

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

Print all even number until 
50
Even number from 1 to 50 are
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50

 

Program 6

In this program, we  print all odd number from 1 to n using the do-while loop

Print  all odd number using do while loop

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

int main()
{
    int i,num;
    printf("Print all odd number until \n");
    scanf("%d",&num);//Reads input from user and stored in variable num
    printf("Odd number from 1 to %d are\n",num);

    i=1;
    do{//loop for iterates from 1 to maximum
        if(i%2==1)
        {
            printf("%d\n",i);
        }
        i++;
    }
    while(i<=num);
getch();
    return 0;
}

 

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

Print all odd  number until 
50
Odd number from 1 to 50 are
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49

 

 

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For loop in C language

While loop in C language

Do while loop in C language

Operator in C language

Data type in C language

Variable in C language