what is loops in vb net code example

Example 1: for loop in vb.net

For a = 10 To 20 Step 2
          Console.WriteLine("value of a: {0}", a)
Next

Example 2: for loop vb.net

For counter [ As datatype ] = start To end [ Step step ]
    [ statements ]
    [ Continue For ]
    [ statements ]
    [ Exit For ]
    [ statements ]
Next [ counter ]