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Conditional Statements

If - Statements

Statements	Syntax
If..Then	if {Condition} then {Statement};
If..Then..Else	if {Condition} then {Statement1} else {Statement2};
If..Then/ Else If..Then/ Else	if {Condition1} then {Statement1} else if {Condition2} then {Statement2} else {Statement3};

จากตารางข้างบน เป็นรูปแบบ If ที่มี statement แค่บรรทัดเดียวต่อหนึ่ง condition เท่านั้น อย่างไรก็ตามหากมี statement หลายบรรทัด ต้องเติม begin .. end ด้วยทุกครั้ง ดังนี้

If-Statement: Multiple Statements

If..Then

if {Condition} then 
 begin
  {Statement1};
  {Statement2};
  {...};
 end;

If..Then..Else

if {Condition} then 
 begin
  {Statement1};
  {Statement2};
  {...};
 end
else
 begin
  {Statement3};
  {Statement4};
  {...};
 end;

If..Then/ Else If..Then/ Else

//---Single Statement---
if {Condition1} then 
 begin
  {Statement1};
  {Statement2};
  {...};  
 end
else if {Condition2} then
 begin
  {Statement3};
  {Statement4};
  {...};
 end
else
 begin
  {Statement5};
  {Statement6};
  {...};
 end;

Case - Statements

Statements

Syntax

Exact value

//---Single Statement---
case {Var} of 
  1: {Statement1};
  2: {Statement2};
  3: {Statement3};
  else {Statement4};
end;

Range

case {Var} of 
  1..10: {Statement1};
  11..20: {Statement2};
  21..30: {Statement3};
  else {Statement4};
end;

Case-Statements: Multiple Statements

Statements

Syntax

Exact value

case {Var} of 
  1: begin 
      {Statement1};
      {Statement2};
      ...;
      end;
  2: begin
      {Statement3};
      {Statement4};
      {Statement5};
      ...
      end;
  3: {Statement6};
  else {Statement7};
end;

Range

case {Var} of 
  1..10: begin 
      {Statement1};
      {Statement2};
      ...;
      end;
  11..20: begin 
      {Statement3};
      {Statement4};
      ...;
      end;
  21..30: begin 
      {Statement5};
      {Statement6};
      ...;
      end;
  else begin 
      {Statement7};
      {Statement8};
      ...;
      end;
end;

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Conditional Statements

If - Statements

Case - Statements

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Conditional Statements

If - Statements

Case - Statements

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