Delphi		If you have many nested if conditions, you can you case statement instead: if C='A' then // 'A' char code else if C='B' then // 'B' char code else if C='C' then // 'C' char code else ... case C of 'A': // 'A' char code 'B': // 'B' char code 'C': // 'C' char code ... end; case can have else at the end: case C of 'A': // 'A' char code 'B': // 'B' char code 'C': // 'C' char code else // other chars code end; You can use begin end for multiline code, multiline code in the else can be placed without begin end: case C of 'A': begin // multiline // 'A' char code end; 'B': // 'B' char code 'C': // 'C' char code else // multiline // other chars code end; You can use several case values and values ranges: case X of 1..9: SomeProcedure; 10,20,30,40: AnotherProcedure; end; case with else allows to change awkward if statements to short and readable code: if (C='A') and (C='B') and (C='C') and (C='D') and (C='E') then SomeProcedure else AnotherProcedure; case C of 'A'..'E': SomeProcedure; else AnotherProcedure; end; if (C<>'A') and (C<>'B') and (C<>'D') and (C<>'E') then SomeProcedure; case C of 'A','B','D','E':; // do nothing else SomeProcedure; end;
C#		switch is used like Delphi's case: switch(C) { case 'A': // 'A' char code break; case 'B': // 'B' char code break; case 'C': // 'C' char code break; default: break; } As you can see, the break operator must be used to prevent executing the next case. Like in Delphi, you can use several case values for one code: switch(X) { case 'A': case 'B': // 'A' & 'B' char code break; case 'C': // 'C' char code break; } You can fall through from one case label to another with goto operator to optimize code (you can use one code fragment for several cases): switch(X) { case 'A': // 'A' char code break; case 'B': // 'B' char code goto case 'A'; // fall through case 'A' case 'C': // 'C' char code break; } but avoid cyclic: switch(X) { case 'A': // 'A' char code goto case 'B'; // fall through case 'B' // cyclic!!! case 'B': // 'B' char code goto case 'A'; // fall through case 'A' }      Ranges cannot be used in case. goto operator allows to use one code for different cases. Do not forget about break and be careful with goto.