Answers for "regex check if number"

3

just number regex js

// https://regex101.com/r/qyq3PG/1
// or 
/^[0-9]*$/
Posted by: Guest on July-11-2020
2

regex match any number

For matching an integer number of one single char/digit, specify:
[0-9]
But for matching any number of more than one char/digit; add "+":
[0-9]+
Example for matching hour with minutes of HH:MM format in a file:
grep "[0-9]\+\:[0-9]\+" file.txt
Posted by: Guest on October-24-2020
0

number pattern js

/^[\+\-]?\d*\.?\d+(?:[Ee][\+\-]?\d+)?$/

/* 
	matched values:
    -2.14e10
    +14E-20
    42.69
*/
Posted by: Guest on June-29-2020

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