Reg-ex to validate a sting with digits only but all Zeros are not allowed [closed]

Code

See regex in use here

^(?!0+$)\d{1,5}$

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Results

Results as described by the header for the section.

** VALID **
1
12345
00001
01
10

** INVALID **
0
00000
123456

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Explanation

• ^ Assert position at the start of the line
• (?!0+$) Negative lookahead ensuring what follows is not 0 one or more times, followed by the end of the line
• \d{1,5} Any digit between 1 and 5 times
• $ Assert position at the end of the line