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1. Functional, array-oriented.
2. Belongs to APL family, but uses plain-ASCII characters only.
3. Supports very large amounts of data, such as database applications.
4. Example: Prime number generation by two distinct algorithm(see APL, A+, J, Q'Nial, yorick version).

   primes : { &0,2=+/0=x!/:x:1+!x }

   sieve : { [ n ] r : n^0.5 s : 0,(n-1)#1 p : 0 while[ p<r; p +: 1+(p _ s)?1; s[-1+1_ p*1+!_ n%p] : 0 ] 1+&s }

   
   

5. References:

   Kx systems

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