C++ Program to Print Even Numbers between 1 to 100 using For & While Loop

• Write a C++ program to print even numbers between 1 to 100. 
• Write a C++ program to print even numbers between 1 to N.

In this tutorial, we are going to write a c++ code which print even numbers between 1 to 100 using for and while loop.

C program to print even numbers between 1 to 100

C++ Program to Print Even Numbers between 1 to 100 using For Loop

#include <iostream>
using namespace std;

int main() {
 
    int i;
 
    /* Run a loop from 1 to 100. */
 
    for(i = 1; i < = 100; i++){
  
       /* If number is divisible by 2. */
  
      if(i % 2 == 0) {

         cout << i <<" "; 
      }
   }
    return 0;
}

Output : 


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 52 54 56 58 60 62 64 66 68 70
72 74 76 78 80 82 84 86 88 90 92 94 96 98 100

C++ Program to Print Even numbers between 1 to 100 using While Loop

#include <iostream>
using namespace std;

int main() {
 
    /* Initialize i with 1. */
 
    int i=1;
 
   /* If i is less than or equal to 100. */
 
   while( i <= 100){
  
      /* If number is divisible by 2, then print.*/
  
      if(i % 2 == 0){
   
         cout <<i<< " ";
      }
  
     /* Increment i. */
  
     i++;
 }
 
 return 0;
}

C++ Program to Print Even numbers between 1 to N

In above examples, we have written a code to print even numbers between 1 to 100 using for and while loop. In this example, instead of 100 we take a input value from user and print even numbers between 1 to n (where n is input by user).

#include <iostream>
using namespace std;

int main() {
 
    /* Initialize i with 1. */
 
    int i=1, n;

    cout << "Enter a number \n";
    cin >> n;
 
   /* If i is less than or equal to n. */
 
   while( i <= n){
  
      /* If number is divisible by 2
         then it's an even number
      */
  
      if(i % 2 == 0){
   
         cout <<i<< " ";
      }
  
     /* Increment i. */
  
     i++;
 }
 
 return 0;
}

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