convert a number from base 10 to base 2 in csharp

To convert a number from base 10 (decimal) to base 2 (binary) in C#, you can use the Convert.ToString method with a second parameter of 2 to specify the base.

Here's an example function that takes a decimal number as input and returns its binary equivalent:

main.cs
public static string DecimalToBinary(int num)
{
    return Convert.ToString(num, 2);
}
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You can call this function on any decimal number, like this:

main.cs
int decimalNum = 42;
string binaryNum = DecimalToBinary(decimalNum);
Console.WriteLine(binaryNum); // Output: 101010
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In this example, decimalNum is the input decimal number and binaryNum is the binary equivalent returned by the DecimalToBinary function. The Console.WriteLine statement outputs the binary number to the console.