0127_Rapper-Future_getty
Rapper Future
 can call himself a rapper and a parent ... AT THE SAME DAMN TIME ... 'cause he just took a DNA test proving he's the father of a 10-year-old son ... TMZ has learned. 

Future -- aka Nayvadius Cash -- was sued last year by Jessica Smith -- who claimed the rapper knocked her up in 2001 ... but should be ordered to pay her child support. 

According to court docs filed in Georgia, the 29-year-old rapper took a DNA test -- which confirmed with 99.9% certainty the kid was his. 

In light of the results, Future and his baby mama struck a deal ... he agreed to be legally recognized as the father, fork over $1,662 in child support per month and pay for the cost of the DNA test ($889). 

The judge signed off on it, and the case was closed earlier this month.