after running this simple code under bash:

perl -e 'for($i=0;$i<10;$i+=0.01){print "$i\n"}'


why I (and you guys) will get the following result:
......(ignored)
9.97999999999983
9.98999999999983
9.99999999999983

In reply to quick question,why int turns to float by fnever

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