Why i cant output the varibles inside the while loop

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
while (true)
{
int e = Convert.ToInt32(Console.ReadLine());
int sum = 0;

if (e % 2 == 0)
{
sum+=e;
}
}
Console.Write(sum);
}
}
}

Answer 1

Two problems here ,

1. You have an infinite loop here : while(true) means loop forever and will eventually cause a Stack Overflow.
2. The variable you are trying to Console.write() is not in the current scope . In simple terms , you have to declare the variable in the same layer or scope as the Console.write()

https://code.sololearn.com/c01jz8JgbPf7/#cs

Answer 2

Xenon

You have declared sum inside loop but accessed outside loop so you will get error because the scope of sum is inside the loop.

Answer 3

Use description to add the code you are talking about.

Answer 4

To anticipate infinite loop, use Int32.TryParse to convert input line into an integer.

Combined with an `if` conditional and `break` statement to exit the loop when no more input was available, the code tries to convert input to integer, and (on success) add the integer to <sum> following the even number verification.

using System;

namespace ReadingInput
{
class Practice
{
static void Main( string[] args )
{
int sum = 0, e = 0;
while ( true )
{
if( !Int32.TryParse( Console.ReadLine(), out e ) )
{
break; // conversion failed!
}
if (e % 2 == 0)
{
sum += e;
}
}
Console.Write( sum );
}
}
}

Answer 5

Oh yea right i forgot

Answer 6

https://code.sololearn.com/cA84uNW2vfAi/?ref=app