String format: {0, 0:#.#}, {0, 0:#.###}, {0, 0:#.#####} (4) : String Format « Data Type « VB.Net Tutorial

1. VB.Net Tutorial
2. Data Type
3. String Format

Module Module1

    Sub Main()
        Dim A As Double = 1.23456789
        Console.WriteLine("{0, 0:#.#}", A)
        Console.WriteLine("{0, 0:#.###}", A)
        Console.WriteLine("{0, 0:#.#####}", A)

    End Sub

End Module

1.2
1.235
1.23457