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tutorial:conditionalstatement [2019/01/07 09:48]
admin [Case - Statements]
tutorial:conditionalstatement [2019/01/07 13:00] (current)
admin [Break, Continue, Exit and Goto]
Line 142: Line 142:
 </​sxh>​ | </​sxh>​ |
 </​hidden>​ \\ </​hidden>​ \\
-===== Break, Continue and Goto =====+===== Break, Continue, Exit and Goto ===== 
 +คำสั่ง Break, Continue, Exit และ Goto สรุปได้ดังนี้  
 + 
 +^  Procedures ​ ^  Meaning ​ ^  Format ​ ^ 
 +| Break | ออกจาก Loop ปัจจุบัน (For/​While/​Repeat) |<sxh delphi;>​ 
 +  for i:=1 to 10 do 
 +    if i=5 then break; 
 + 
 +  writeln('​i = ',​i); ​ //i = 5 
 +  readln;  
 +</​sxh>​ | 
 +|Continue| สิ้นสุด Loop ปัจจุบันทันที เพื่อเริ่ม Loop ปัจจุบันใหม่ในรอบถัดไป (For/​While/​Repeat) |<sxh delphi;>​ 
 +  for i:=1 to 5 do 
 +  begin 
 +    if i=4 then continue; 
 +    writeln('​i = ',i); //i = 4 won't be showed 
 +  end;  
 +</​sxh>​ | 
 +|Exit| ออกจาก Sub-Program ปัจจุบัน (Procedure/​Function) |<sxh delphi;>​ 
 +procedure MyProc; 
 +begin 
 +  exit; 
 +  writeln('​After Exit'​);​ //This won't be shown 
 +end; 
 +</​sxh>​ | 
 +|Goto| ไปยัง Label ที่ระบุ |<sxh delphi;>​ 
 +label PointA,​PointB;​ //declare labels 
 +BEGIN 
 + Goto PointB; 
 + ​PointA:​ 
 + ​wrtieln('​Passing PointA'​);​ 
 + exit; //Exit the program 
 + ​PointB:​ 
 + ​wrtieln('​Passing PointB'​);​ 
 + Goto PointA; 
 +END. 
 +</​sxh>​ |
tutorial/conditionalstatement.1546829333.txt.gz · Last modified: 2019/01/07 09:48 by admin