a, b =: 6, 4
 print 'a + b =', a + b
 print 'a - b =', a - b
 print 'a * b =', a * b
 print 'a // b =', a // b     \ integer division is %%
 print 'a %% b =', a %% b     \ usual modulus
 print 'a ^ b =', a ^ b
 qr =: a // b, a %% b         \ operator /% rarely used, not implemented
 print 'a /% b =', join qr by ','
 r =: a / b                   \ rational result
 print r, r.num, r.den	      \ number, numerator, denominator