C program to print all natural numbers from 1 to n using while loop

Write a C program to enter any number from user and print all natural numbers from 1 to n using while loop. How to print all natural numbers from 1 to n using while loop in C programming.

Input upper limit to print natural numbers: 10

Natural numbers from 1 to 10: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Required knowledge

Basic C programming, Loop

Learn this program using other approaches.

Read more –

• Program to print natural numbers from 1 to n using for loop
• Program to print natural numbers from 1 to n using recursion

Program to print natural numbers using while loop

/**
 * C program to print all natural numbers from 1 to n using while loop
 */

#include <stdio.h>

int main()
{
    int i, end;

    /*
     * Input a number from user
     */
    printf("Print all natural numbers from 1 to : ");
    scanf("%d", &end);

    /*
     * Print natural numbers from 1 to end
     */
    i=1;
    while(i<=end)
    {
        printf("%d\n", i);
        i++;
    }

    return 0;
}

Note: Initialize the loop counter variable i with some starting limit value i.e. i = start;, to print natural numbers in range.

Print all natural numbers from 1 to : 100
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100

Happy coding 😉