Valid Number

Validate if a given string is numeric.

Some examples: "0"=>true " 0.1 "=>true "abc"=>false "1 a"=>false "2e10"=>true

Note:It is intended for the problem statement to be ambiguous. You should gather all requirements up front before implementing one.

Solution

class Solution {
    public boolean isNumber(String s) {

    }
}

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