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The following is a regular expression example.  With this example, we want to match any of the following:


 x3x   x4x   x5x   x6x   x7x


In this case, the integer part of the pattern ranges from 3 to 7.  This would require a regular expression as follows:



When this is tested in the RegEx Testing Utility which ships with Blade, we can see it matches only the entries we require.

Figure 1


This could also be written as: