download pascal tutorial (pdf - Tutorials Point

More documents

Recommendations

Info

Statement if - then statement If-then-else statement nested if statements case statement case - else statement nested case statements Description An if - then statement consists of a boolean expression followed by one or more statements. An if - then statement can be followed by an optional else statement, which executes when the boolean expression is false. You can use one if or else if statement inside another if or else if statement(s). A case statement allows a variable to be tested for equality against a list of values. It is similar to the if-then-else statement. Here, an else term follows the case statement. You can use one case statement inside another case statement(s). if-then Statement The if-then statement is the simplest form of control statement, frequently used in decision making and changing the control flow of the program execution. Syntax Syntax for if-then statement is: if condition then S Where condition is a Boolean or relational condition and S is a simple or compound statement. Example of an if-then statement is: if (a
Example: Let us try a complete example that would illustrate the concept: program ifChecking; var { local variable declaration } a:integer; begin a:= 10; (* check the boolean condition using if statement *) if( a < 20 ) then (* if condition is true then print the following *) writeln('a is less than 20 ' ); writeln('value of a is : ', a); end. When the above code is compiled and executed, it produces the following result: a is less than 20 value of a is : 10 TUTORIALS POINT Simply Easy Learning Page 33
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: CHAPTER 9 Decision Making This sect
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 and 50: Flow Diagram: Example: The followin
Page 51 and 52: CHAPTER 10 Loops This section shows
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
Page 101 and 102:
To check for a nil pointer, you can
Page 103 and 104:
program exPointers; const MAX = 3;
Page 105 and 106:
program exPointers; const MAX = 3;
Page 107 and 108:
Value of num = 3000 Value available
Page 109 and 110:
CHAPTER 18 Records This section sho
Page 111 and 112:
(* book 2 specification *) Book2.ti
Page 113 and 114:
type record-ptr = ^ record-name; re
Page 115 and 116:
(* book 1 specification *) Book1.ti
Page 117 and 118:
Example: The following example woul
Page 119:
Set Operators You can perform the f
Page 122 and 123:
CHAPTER 21 File Handling This secti
Page 124 and 125:
When the above code is compiled and
Page 126 and 127:
Page 128 and 129:
Reads data from a file into memory
Page 130 and 131:
Reads from file into variable and g
Page 132 and 133:
CHAPTER 22 Memory Management This s
Page 134 and 135:
Resizing and Releasing Memory When
Page 136 and 137:
Frees dynamically allocated memory
Page 138 and 139:
Returns segment 37 procedure SetMem
Page 140 and 141:
eadkey; clrscr; gotoxy(20,3); write
Page 142 and 143:
Page 144 and 145:
Program DateDemo; uses sysutils; va
Page 146 and 147:
14 function EncodeDate( Year: Word;
Page 148 and 149:
39 function TimeStampToDateTime( co
Page 150 and 151:
Objects This section shows the conc
Page 152 and 153:
type Rectangle = object private len
Page 154 and 155:
Page 156 and 157:
egin r1.init(3, 7); writeln('Draw a
Page 158 and 159:
function TableTop.getmaterial(): st
Page 160 and 161:
Classes This section shows the clas
Page 162 and 163:
{$mode objfpc} // directive to be u
Page 164 and 165:
Constructors and Destructors for Pa
Page 166 and 167:
program inheritanceExample; {$MODE
Page 168 and 169:
show all

download pascal tutorial (pdf - Tutorials Point

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?