Class 10 Computer Chapter 1 Notes

Complete Class 10 Computer Chapter 1 Notes Introduction to Programming in 10th Class Computer Science English and Urdu Medium. These computerized notes are very helpful in the preparation of Introduction from Class 10 Computer Chapter 1 Notes to Programming for students of the 10th class Computer Science and these are according to the paper patterns of all Punjab boards.

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• Topics which are discussed in the notes are given below:Important Multiple Choice Questions ( MCQs ) with correct Answers of Chapter No. 1: Introduction to Programming in Computer Science class 10th Urdu Medium.
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• Programming Basics: Each programming language has some primitive building blocks and provides some rules in order to write an accurate program. This set of rules is known as syntax of the language. 
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• Syntax can be thought of as grammar of a programming language. While programming, if proper syntax or rules of the programming language are not followed, the program does not get compiled. In this case, the compiler generates an error. This kind of errors are called syntax errors.
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• Reserved Words: Every programming language has a list of words that are predefined. Each word has its specific meaning already known to the compiler. 
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• These words are known as reserved words or keywords. If a programmer gives them a definition of his own, it causes a syntax error. The list of reserved words in C programming language.
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• Structure of a C Program: We can understand the structure of a C language program, by observing the program written. We can see that a program can be divided into three main parts:
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• 1. Link section or header section: While writing programs in C language, we make extensive use of functions that are already defined in the language. But before using the existing functions, we need to include the files where these functions have been defined.
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•  These files are called header files. We include these header files in our program by writing the include statements at the top of program. General structure of an include statement is as follows:  #include
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• Here header_file_name can be the name of any header file. In the above example, we have included file stdio.h that contains information related to input and output functions. 
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• Many other header files are also available, for example file math.h contains all predefined mathematics functions.
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• 2. Main section: It consists of a main() function. Every C program must contain a main() function and it is the starting point of execution.
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• 3. Body of main() function: The body of main() is enclosed in the curly braces {}. All the statements inside these curly braces make the body of main function. In the above program, the statement printf("Hello world!"); uses a predefined function printf to display the statement Hello World! on computer screen.
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•  We can also create other functions in our program and use them inside the body of main() function.
• Important Note: Following points must be kept in mind in order to write syntactically correct C language programs.
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• The sequence of statements in a C language program should be according to the sequence in which we want our program to be executed.
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• C language is case sensitive. It means that if a keyword is defined with all small case letters, we cannot capitalize any letter i.e. int is different from Int. Former is a keyword, whereas latter is not.
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• Each statement ends with a semi-colon; symbol.
• Purpose and Syntax of Comments in C Programs: Comments are the statements in a program that are ignored by the compiler and do not get executed. 
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• Usually comments are written in natural language e.g. in English language, in order to provide description of our code.
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• Purpose of writing comments: Comments can be thought of as documentation of the program. Their purpose is twofold. 1) They facilitate other programmers to understand our code. 2) They help us to understand our own code even after years of writing it. We do not want these statements to be executed, because it may cause syntax error as the statements are written in natural language.
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