The first steps of CSound

I thought it would be interesting to compare the code of CSound with Pure Data.  This what I found on Csound.

 This is a possible transformation of the signal graph into Csound code:

    instr Sine
aSig      oscils    0.2, 400, 0
          out       aSig
    endin

The oscillator is represented by the opcode oscils and gets its input arguments on the right-hand side. These are amplitude (0.2), frequency (400) and phase (0). It produces an audio signal called aSig at the left side, which is in turn the input of the second opcode out. The first and last lines encase these connections inside an instrument called Sine. That's it.