Indentation also helps with debugging and code presentation. Indentation is a must in writing programs as it makes it easier to read ie. This first program is, what is commonly referred to in programming, as 'indented'. The only difference is: neatness and friendliness. This program also runs perfectly as the previous one. Now, look at this: Program Lesson1_Program2 begin Try running this program with and without the 'readln' procedure and notice the difference. If 'readln' is removed from that line, then the message is displayed on the screen without giving any chance for the user to read it and exits! The 'readln' procedure, here is used to pause the program and waits until the user hits the return key. So, to display any message on the screen, you should use 'write' (or 'writeln'). Prepare to learn PASCAL!!' - an introductory message that is displayed to you whenever you are going to learn a new programming language. The program is written only to display the message : 'Hello World.
A very simple program is shown below: Program Lesson1_Program1 As you go along with the lessons, you must note what you can do and what you cannot do in writing a Pascal program. The Pascal programming language is a high level language that has its own syntax rules and grammar rules. A natural language has its own grammar rules, spelling and sentence construction. In a program, you must always obey the rules of the language, in our case, the Pascal language. Read the lessons FREE & OFFLINE from the convenience of your phone.
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