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Rexx Recursive Function

/* Main program */ 
do n = 1 to 5 
say 'The factorial of' n 'is:' factorial( n ) 
end 
return  

/* Function to get factorial */ 
factorial : procedure 
n = arg(1) 
if n = 1 then 
return 1 
return n * factorial( n - 1 ) 

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