Menu
I'm trying to validate input for floating number which max value is 1.0 and min value is 0.
Min : 0
Max : 1
Possible values ;
0.1
0.99
0.365
how can i succeed it with regex?
398
As an example, we will try to build a regular expression that can match any floating point number. Our regex should also match integers and floating point numbers where the integer part is not given. We will not try to match numbers with an exponent, such as 1.5e8 (150 million in scientific notation).
The Regex number range include matching 0 to 9, 1 to 9, 0 to 10, 1 to 10, 1 to 12, 1 to 16 and 1-31, 1-32, 0-99, 0-100, 1-100,1-127, 0-255, 0-999, 1-999, 1-1000 and 1-9999.
Since regular expressions work with text, a regular expression engine treats 0 as a single character, and 255 as three characters. To match all characters from 0 to 255, we'll need a regex that matches between one and three characters. The regex [0-9] matches single-digit numbers 0 to 9. [1-9][0-9] matches double-digit numbers 10 to 99.
Spelling out the regex in words makes it obvious: everything in this regular expression is optional. This regular expression considers a sign by itself or a dot by itself as a valid floating point number. In fact, it even considers an empty string as a valid floating point number.
As javascript regex literal:
/^(0(\.\d+)?|1(\.0+)?)$/
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
