## Find positive numbers

Create a regexp that looks for positive numbers, including those without a decimal point.

An example of use:

```
let reg = /your regexp/g;
let str = "1.5 0 -5 12. 123.4.";
alert( str.match(reg) ); // 1.5, 12, 123.4 (ignores 0 and -5)
```

An non-negative integer number is `\d+`

. We should exclude `0`

as the first digit, as we don’t need zero, but we can allow it in further digits.

So that gives us `[1-9]\d*`

.

A decimal part is: `\.\d+`

.

Because the decimal part is optional, let’s put it in parentheses with the quantifier `'?'`

.

Finally we have the regexp: `[1-9]\d*(\.\d+)?`

:

```
let reg = /[1-9]\d*(\.\d+)?/g;
let str = "1.5 0 -5 12. 123.4.";
alert( str.match(reg) ); // 1.5, 0, 12, 123.4
```