I don't think this is possible within sprintf. All floating point numbers have to have a digit before the decimal point.

The standard for printf family of functions states:

f, F
The double argument is rounded and converted to decimal notation in the style -ddd.ddd, where the number of digits after the decimal-point character is equal to the precision specification. If the precision is missing, it is taken as 6; if the precision is explicitly zero, no decimal-point character appears. If a decimal point appears, at least one digit appears before it.

Not too difficult to do with a quick regex or something, though.

$str =~ s/^0\./\./;

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In reply to Re: Can sprintf suppress leading zero for float < 1? by temporal
in thread Can sprintf suppress leading zero for float < 1? by RotoValue

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