Keep no leading zeros when formatting number

Is there a quick and easy way to format a number without at least one leading zero?
For example, “0.01” will be formatted as “.01”?

In XSLT, we can pass number format mask as “#,###.00” for no leading zero before the decimal point if applicable and at least two digits after the decimal point.

Also, we can pass number format mask as “#,##0.00” for at least one leading zero before the decimal point and at least two digits after the decimal point.

Unfortunately such feature is not supported, but you may create your own custom exCell with any needed attributes.
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