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Module DEMO-32-58DEMO-C-32

Print Even Numbers

DEMO-C-32 • Programming in C

Browser-only practice

Problem Statement

Write a C program that reads a positive integer n from the user and prints all even numbers from 1 to n (inclusive), each on a new line.

An even number is any integer that is divisible by 2 with no remainder.

For example, if n is 10, the even numbers from 1 to 10 are: 2, 4, 6, 8, 10.

If n is less than 2, no even numbers should be printed since there are no even numbers in that range.

Constraints

1 ≤ n ≤ 1000 Only use basic C constructs (loops, conditionals, variables) Do not use arrays or functions other than those in stdio.h

Input Format

A single line containing a positive integer n (1 ≤ n ≤ 1000).

Output Format

Print each even number from 1 to n on a separate line. If there are no even numbers in the range, print nothing.

Sample Testcases

Submit runs every public testcase in this browser. Results and code never leave this device.

Sample #1
Public sample
Input
10
Output
2
4
6
8
10
Explanation
Sample case showing even numbers from 1 to 10.
Sample #2
Public sample
Input
15
Output
2
4
6
8
10
12
14
Explanation
Hidden case with odd n value to test boundary handling.
Sample #3
Public sample
Input
1
Output

                                    
Explanation
Sample case with n=1, no even numbers to print.
                                

                                                            

                                    
Sample #4
Public sample

                                    
Input
2

                                    
Output
2

                                    
Explanation
Hidden case with n=2, only one even number to print.
                                

                                                            

                                    
Sample #5
Public sample

                                    
Input
20

                                    
Output
2
4
6
8
10
12
14
16
18
20

                                    
Explanation
Sample case with larger n value.
                                

                                                            

                                    
Sample #6
Public sample

                                    
Input
4

                                    
Output
2
4

                                    
Explanation
Sample case with small even n value.
                                

                                                    

                    

                

                

            


            

                

                    

                        

                            

                                
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