Convert & Parse methods

Convert & Parse methods

There are two groups of methods, which aid us at converting values.

using System;

class CSharpApp
{
    static void Main()
    {
        Console.WriteLine(Convert.ToBoolean(0.3));
        Console.WriteLine(Convert.ToBoolean(3));
        Console.WriteLine(Convert.ToBoolean(0));
        Console.WriteLine(Convert.ToBoolean(-1));

        Console.WriteLine(Convert.ToInt32("452"));
        Console.WriteLine(Convert.ToInt32(34.5));
    }
}

The Convert class has many methods for converting values. We use two of them.

Console.WriteLine(Convert.ToBoolean(0.3));

We convert a double value to a bool value.

Console.WriteLine(Convert.ToInt32("452"));

And here we convert a string to int.

---

using System;

class CSharpApp
{
    static void Main()
    {
        Console.WriteLine(Int32.Parse("34"));
        Console.WriteLine(Int32.Parse("-34"));
        Console.WriteLine(Int32.Parse("+34"));
    }
}

Converting strings to integers is a very common task. Often when we bring values from databases or GUI widgets.

Console.WriteLine(Int32.Parse("34"));

We use the Parse() method of the Int32 class to convert a string to int value.