Choosing from several alternatives

• Abstract code

  if k=0 then a=20
  
  else if k=1 then a=10
  else if k=2 then a=11;

• C/C++ representation (uses ‘switch’)

  switch(k){
  
  0 : a = 20; break;
  
  1 : a = 10; break;
  2 : a = 11;
  }

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