Question

I have a simple quastion.
I have this C# code:

static void Main(string[] args)
{
    int num1, i, j, x, y;
    Console.WriteLine("enter number");
    num1=int.Parse(Console.ReadLine());
    for (i=1; i<=num1; i++){
        for (j=1; j<i+1; j++) {
        Console.Write(i);

        }Console.Write("\n"); 
    }
     for (x=num1; x>=0; x--){
        for (y=0; y<x; y++) {
        Console.Write(x);

        }Console.Write("\n"); 
    }
    Console.ReadLine();
}

The middle line is repeat twice

Which print triangle from numbers.
The problem is that the middle line is repeated twice.
My question is how can I change the loop, so the middle line numbers will repeat twice?
Wish for help, thanks!

Answer 1

Because both for loops include num1 as an inclusive condition:

for (i=1; i<=num1; i++){
    // num1 is the last number in this loop
}
for (x=num1; x>=0; x--){
    // num1 is the first number in this loop
}

Change the first loop to stop BEFORE num1:

for (i=1; i<num1; i++){