C Program to Print Even Numbers Between 1 to 100 using For and While Loop

  • Write a C program to print even numbers between 1 to 100 using for loop.
  • Write a C program to print all even numbers between 1 to N using while loop.

Required Knowledge


C program to print even numbers between 1 to 100 using for loop

#include <stdio.h>  
  
int main() {  
    int counter; 
    printf("Even numbers between 1 to 100\n");  
    /* 
     * Initialize counter with 1, and increment it in every iteration.
     * For every value of counter check whether it is even number or
     * not and print it accordingly 
     */  
    for(counter = 1; counter <= 100; counter++) {  
        /* Even numbers are divisible by 2 */  
        if(counter%2 == 0) { 
            /* counter is even, print it */
            printf("%d ", counter);  
        }  
    }  
  
    return 0;  
} 

Output
Even numbers between 1 to 100
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 from 1 to N using while loop

#include <stdio.h>  
  
int main() {  
    int counter; 
    printf("Even numbers between 1 to 100\n");  
    /* 
     * Initialize counter with first even number 2, and increment 
     * it by 2 in every iteration.
     */
    counter = 2;
    while (counter <= 100) {  
        printf("%d ", counter);
        /* Add 2 to current even number 
           to get next even number */
        counter = counter + 2;  
    }  
  
    return 0;  
} 

Output
Even numbers between 1 to 100
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

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