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Nested Case Statements It is possible to have a case statement as part of the statement sequence of an outer case statement. Even if the case constants of the inner and outer case contain common values, no conflicts will arise. Syntax: The syntax for a nested case statement is as follows: case (ch1) of 'A': begin writeln('This A is part of outer case' ); case(ch2) of 'A': writeln('This A is part of inner case' ); 'B': (* case code *) ... end; {end of inner case} end; (* end of case 'A' of outer statement *) 'B': (* case code *) 'C': (* case code *) ... end; {end of outer case} Example: The following program illustrates the concept. program checknestedCase; var a, b: integer; begin a := 100; b := 200; case (a) of 100: begin writeln('This is part of outer statement' ); case (b) of 200: writeln('This is part of inner statement' ); end; end; end; writeln('Exact value of a is : ', a ); writeln('Exact value of b is : ', b ); end. When the above code is compiled and executed, it produces the following result: This is part of outer switch This is part of inner switch Exact value of a is: 100 Exact value of b is: 200 TUTORIALS POINT Simply Easy Learning Page 42
CHAPTER 10 Loops This section shows loop statements used in Pascal : There may be a situation, when you need to execute a block of code several number of times. In general, statements are executed sequentially: The first statement in a function is executed first, followed by the second, and so on. Programming languages provide various control structures that allow for more complicated execution paths. A loop statement allows us to execute a statement or group of statements multiple times and following is the general form of a loop statement in most of the programming languages: TUTORIALS POINT Simply Easy Learning Page 43
Page 1 and 2: Pascal Tutorial
Page 3 and 4: ABOUT THE TUTORIAL Pascal Tutorial
Page 5 and 6: Declaring Constants ...............
Page 7 and 8: Accessing Two-Dimensional Array Ele
Page 9 and 10: CHAPTER 1 Pascal Overview This chap
Page 11 and 12: CHAPTER 2 Environment This section
Page 13 and 14: Name and version of text editor can
Page 15 and 16: Pascal Hello World Example Followin
Page 17 and 18: CHAPTER 4 Basic Syntax You have see
Page 19 and 20: The Pascal character set consists o
Page 21 and 22: Type Declarations: The type declara
Page 23 and 24: Subrange Types Subrange types allow
Page 25 and 26: Pascal programming language also al
Page 27 and 28: Enumerated Variables You have seen
Page 29 and 30: CHAPTER 7 Constants This section sh
Page 31 and 32: CHAPTER 8 Operators This section sh
Page 33 and 34: Checks if the value of left operand
Page 35 and 36: When the above code is compiled and
Page 37 and 38: program beBitwise; var a, b, c: int
Page 39 and 40: CHAPTER 9 Decision Making This sect
Page 41 and 42: Example: Let us try a complete exam
Page 43 and 44: Example: Let us try a complete exam
Page 45 and 46: Nested if-then Statements It is alw
Page 47 and 48: The following rules apply to a case
Page 49: Flow Diagram: Example: The followin
Page 53 and 54: Flow Diagram: Here, key point of th
Page 55 and 56: Flow Diagram Example: program forLo
Page 57 and 58: Example: program repeatUntilLoop; v
Page 61 and 62: Example: program exBreak; var a: in
Page 63 and 64: Example: program exContinue; var a:
Page 65 and 66: Example: The following program illu
Page 67 and 68: Defining a Function: In Pascal, a f
Page 71 and 72: variable named m. The variable m is
Page 73 and 74: program exRecursion; var num, f: in
Page 75 and 76: procedure swap(x, y: integer); var
Page 79 and 80: Now, let us extend the program litt
Page 81 and 82: Let us change the previous example
Page 85 and 86: 12 function AnsiStrLower( Str: PCha
Page 87 and 88: CHAPTER 15 Boolean This section sho
Page 89 and 90: CHAPTER 16 Arrays This section show
Page 91 and 92: Initializing Arrays In Pascal, arra
Page 93 and 94: Two-Dimensional Arrays: The simples
Page 95 and 96: The following example declares and
Page 97 and 98: Passing Arrays as Subprogram Argume
Page 99 and 100: Following are some valid pointer de
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To check for a nil pointer, you can
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program exPointers; const MAX = 3;
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program exPointers; const MAX = 3;
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Value of num = 3000 Value available
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CHAPTER 18 Records This section sho
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(* book 2 specification *) Book2.ti
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type record-ptr = ^ record-name; re
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(* book 1 specification *) Book1.ti
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Example: The following example woul
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Set Operators You can perform the f
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CHAPTER 21 File Handling This secti
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When the above code is compiled and
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Reads data from a file into memory
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Reads from file into variable and g
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CHAPTER 22 Memory Management This s
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Resizing and Releasing Memory When
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Frees dynamically allocated memory
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Returns segment 37 procedure SetMem
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eadkey; clrscr; gotoxy(20,3); write
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Program DateDemo; uses sysutils; va
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14 function EncodeDate( Year: Word;
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39 function TimeStampToDateTime( co
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Objects This section shows the conc
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type Rectangle = object private len
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egin r1.init(3, 7); writeln('Draw a
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function TableTop.getmaterial(): st
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Classes This section shows the clas
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{$mode objfpc} // directive to be u
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Constructors and Destructors for Pa
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program inheritanceExample; {$MODE
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