Regex that matches integers only

Question

I\'m currently using the pattern: \\b\\d+\\b, testing it with these entries:

numb3r 
2
3454 
3.214
test

I only want it to catc

Answer 1

This worked in my case where I needed positive and negative integers that should NOT include zero-starting numbers like 01258 but should of course include 0

^(-?[1-9]+\d*)$|^0$

Example of valid values: "3", "-3", "0", "-555", "945465464654"

Example of not valid values: "0.0", "1.0", "0.7", "690.7", "0.0001", "a", "", " ", ".", "-", "001", "00.2", "000.5", ".3", "3.", " -1", "+100", "--1", "-.1", "-0", "00099", "099"