How do you write a program to take N numbers as input and output all even numbers from 1 to N inclusive, each on a new line.

Question

May anyone help? I am confused with how you stop the loop at the input and how you valdate the num is even.

Answer 1

while True :
try:
n = int(input())
if not n%2:
print(n)
except:
break

Answer 2

Hi Jay Scott
Which language?
Could you post your attempt also so we may see where you are struggling

Answer 3

Here is a python example:

user_num = int(input())
for i in range(user_num +1):
if i%2==0:
print(i)

Answer 4

the question leaves room for questions.
From your statement "1 to N inclusive" I'd assume that N is just one number and reflects the maximum (even) number to print.
Considering this (and python as language) that should work:

for i in range(1,int(input("Max:"))+1):
if not i%2:
print(i)

As second solution, as Frogged already demonstrated:
you can get multiple input values, maybe collect them in a list, and as soon as the input is just a carrige return (or anything that is not number, like the string "end") you can print out the list:

mylist = []
while True:
try:
mylist.append(int(input()))

except:
break

for i in mylist:
if not i%2:
print(i)

Answer 5

I've been strugling with this one quite a bit and the posts i found didn't really clear it up for me. (probably because im still not skilled at C# at all and don't recognize what the others were suggesting).

Eventually this worked for me, i'd thought I post it, mabey it will help someone else :)

{
int num = Convert.ToInt32(Console.ReadLine());
int res = 0;
//your code goes here

while (res < num)
{
res ++;
if (res % 2 == 0)
{
Console.WriteLine(res);
}
}

}

Answer 6

Abhik Mukherjee
The following is straight out of the c# tutorial, Conditions and Loops.

I suggest you revisit

for (int i =0; i <=10; i+=2){
Console.WriteLine(i);
}

Answer 7

@Rik Wittkopp Thanks a lot mate. It was indeed simple and mere foolish on my part. Much appreciated.

Answer 8

Hello everyone, I am also facing the same issue but I guess the question being asked is for the C# code, so it'll be very helpful if anyone can explain it.