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authorGanesha Danu Enastika <ganeshadanu1@gmail.com>2018-02-28 17:01:47 +0700
committerPratik Karki <predatoramigo@gmail.com>2018-02-28 15:46:47 +0545
commit8e65231b5c33277d195daaed4a86f9ce5f19c1c1 (patch)
tree2c781c082fbe0fdfc7c6fa4ee5022214c799a268 /pascal.html.markdown
parent51b591a329f9e302cd522a12765f6cce610daaf3 (diff)
[Pascal/en] Add pascal language (#3025)
* added a pascal tutorial * added a pascal tutorial * add more operation
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+---
+language: Pascal
+filename: learnpascal.pas
+contributors:
+ - ["Ganesha Danu", "http://github.com/blinfoldking"]
+---
+
+
+>Pascal is an imperative and procedural programming language, which Niklaus Wirth designed in 1968–69 and published in 1970, as a small, efficient language intended to encourage good programming practices using structured programming and data structuring. It is named in honor of the French mathematician, philosopher and physicist Blaise Pascal.
+source : [wikipedia](https://en.wikipedia.org/wiki/Pascal_(programming_language))
+
+
+
+to compile and run a pascal program you could use a free pascal compiler. [Download Here](https://www.freepascal.org/)
+
+```pascal
+//Anathomy of a Pascal Program
+//this is a comment
+{
+ this is a
+ multiline comment
+}
+
+//name of the program
+program learn_pascal; //<-- dont forget a semicolon
+
+type
+ {
+ this is where you should delcare a custom
+ data-types
+ }
+var
+ {
+ this is where you should declare a variable
+ }
+
+//main program area
+begin
+ {
+ area to declare your instruction
+ }
+end. // End of a main program area should required a "." symbol
+```
+
+```pascal
+//declaring variable
+//you can do this
+var a:integer;
+var b:integer;
+//or this
+var
+ a : integer;
+ b : integer;
+//or this
+var a,b : integer;
+```
+```pascal
+program Learn_More;
+//Lets learn about data types and their operations
+
+//Declaring variables
+var
+ int : integer; // a variable that contains an integer number data types
+ ch : char; // a variable that contains a character data types
+ str : string; // a variable that contains a string data types
+ r : real; // a variable that contains a real number data types
+ bool : boolean; //a variables that contains a Boolean(True/False) value data types
+Begin
+ int := 1;// how to assign a value to a variable
+ r := 3.14;
+ ch := 'a';
+ str := 'apple';
+ bool := true;
+ //pascal is not a case-sensitive language
+ //arithmethic operation
+ int := 1 + 1; // int = 2 overwriting the previous assignment
+ int := int + 1; // int = 2 + 1 = 3;
+ int := 4 div 2; //int = 2 a division operation which the result will be floored
+ int := 3 div 2; //int = 1
+ int := 1 div 2; //int = 0
+
+ bool := true or false; // bool = true
+ bool := false and true; // bool = false
+ bool := true xor true; // bool = false
+
+ r := 3 / 2; // a division operator for real
+ r := int; // you can assign an integer to a real variable but not the otherwise
+
+ c := str[1]; // assign the first letter of str to c
+ str := 'hello' + 'world'; //combining strings
+End.
+```
+
+```pascal
+
+``` \ No newline at end of file