Print 1 to 100 Numbers in C Programming | C Programming Examples - 6

Print 1 to 100 Numbers in C Programming | C Programming Examples - 6

This is a very simple program for beginners to understand how loop works. 

C Programming Examples:

1. Write a C Program to print 1 to 100 numbers.
2. C program to print 1 to 100 numbers using for loop.
3. C program to print 1 to 100 numbers using while loop.
4. C program to print 1 to 100 numbers without using  loop.

C Program to Print 1 to 100 Numbers Using For Loop  :

#include<stdio.h>

int main()
{
   int i;
   for(i=1;i<=100;i++)
   {
      printf("%d\n",i);
   }
}

C Program to Print 1 to 100 Numbers Using While Loop  :

#include<stdio.h>

int main() {

   int i=1;
 
   //i is less than or equal to 100
   while( i  <= 100) {
      //print the value of i
      printf("%d\n", i);
 
      //Increment the value of i
      i++;
   }

   return 0;
}

Explanation of  Printing 1 to 100 Numbers in C:

1) Initialises i as an integer.

2) Now i=1 and is lesser than 100 so condition satisfies and prints the value of i which is 1.

3) Now i is incremented to '2' and again it is less than 100 so condition satisfies and prints the value of i which is '2'.

4) It goes like that until i is equal to 100 and it is equal to 100 so it prints 100 than the value of i is incremented to 101 which dissatisfies the condition causing to come out of the loop.

5) As there are no statements out of the loop the program terminates.

How to write a program to print 1 to 100 numbers without using loop? Using loop, (for and while loop) we can easily solve this problem. Think for a moment how do you solve this problem without using a loop. We can solve this problem using recursion.

C Program to Print 1 to 100 Numbers Without Using Loop  :

#include <stdio.h>
int main() {
    //number start from 1
    int n = 1;
    //Method call
    printNum(n);
    return 0;
}
int printNum(int num) {
    //If number is less than or equal to 100	
    if(num <= 100) {
      printf("%d\n",num);
      //recursive call
      printNum(num+1);
    }
}

Output:

1

2

3

4

5

.

.

.

.

.

100

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