What is the regex for Any positive integer excluding 0

Question

How can   d   be improved to disallow 0   EDIT  Make it more concrete      Examples to allow  1 30 111 Examples to disallow  0 00 -22  It doesn t matter if positive numbers with a leading zero are allowed or not  e g  022    This is for Java JDK Regex implementation

User · Accepted Answer

Try this     1-9  d        and some padding to exceed 30 character SO answer limit  -    Here is Demo

User · Answer

Try this one  this one works best to suffice the requiremnt    1-9  0-9     Here is the sample output  String 0 matches regex  false String 1 matches regex  true String 2 matches regex  true String 3 matches regex  true String 4 matches regex  true String 5 matches regex  true String 6 matches regex  true String 7 matches regex  true String 8 matches regex  true String 9 matches regex  true String 10 matches regex  true String 11 matches regex  true String 12 matches regex  true String 13 matches regex  true String 14 matches regex  true String 15 matches regex  true String 16 matches regex  true String 999 matches regex  true String 2654 matches regex  true String 25633 matches regex  true String 254444 matches regex  true String 0 1 matches regex  false String 0 2 matches regex  false String 0 3 matches regex  false String -1 matches regex  false String -2 matches regex  false String -5 matches regex  false String -6 matches regex  false String -6 8 matches regex  false String -9 matches regex  false String -54 matches regex  false String -29 matches regex  false String 1000 matches regex  true String 100000 matches regex  true

User · Answer

Sorry to come in late but the OP wants to allow 076 but probably does NOT want to allow 0000000000   So in this case we want a string of one or more digits containing at least one non-zero   That is    0-9   1-9  0-9

User · Answer

Just for fun  another alternative using lookaheads        d  1-9   d     As many digits as you want  but at least one must be  1-9

User · Answer

d  1-9  d       this can include all positive values  even if it is padded by Zero in the front  Allows  1  01  10  11  etc  do not allow  0   00  000 etc

User · Answer

Any positive integer  excluding 0       1-9  d      Any positive integer  including 0    0     1-9  d

User · Answer

You might try a negative lookahead assertion       0    d

User · Answer

1-9    is the simplest I can think of

User · Answer

My pattern is complicated  but it covers exactly  Any positive integer  excluding 0   1 - 2147483647  not long    It s for decimal numbers and doesn t allow leading zeros      1  1-9  0-9  0 8   20 0-9  8   21 0-3  0-9  7    214 0-6  0-9  6     2147 0-3  0-9  5    21474 0-7  0-9  4    214748 0-2  0-9  3     2147483 0-5  0-9  2    21474836 0-3  0-9    214748364 0-7

User · Answer

You might want this  edit  allow number of the form 0123          1-9         d     however  if it were me  I would instead do   int x   Integer parseInt s  if  x  gt  0

User · Answer

Got this one     1-9   0-9  2      Someone beats it

User · Answer

This RegEx matches any Integer positive out of 0       lt  -    lt   d  1-9  0-9     It works with two negative lookbehinds  which search for a minus before a number  which indicates it is a negative number  It also works for any negative number larger than -9  e g  -22

User · Answer

This should only allow decimals   0      0-9    d     1-9  d     d

[java] What is the regex for "Any positive integer, excluding 0"

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