Tutorial 3: Writing C Code

Let's begin writing some C language code. Prior to that, there are a few rules that a beginner must follow.

➡️Each instruction in a C program is written as a separate statement. Therefore a complete C program would comprise of a series of statements.

➡️The statements in a program must appear in the same order in which we wish them to be executed; unless of course the logic of the problem demands a deliberate ‘jump’ or transfer of control to a statement, which is out of sequence.

➡️Blank spaces may be inserted between two words to improve the readability of the statement. However, no blank spaces are allowed within a variable, constant or keyword.

➡️All statements are entered in small case letters.

➡️C has no specific rules for the position at which a statement is to be written. That’s why it is often called a free-form language.

➡️Every C statement must end with a ;. Thus ; acts as a statement terminator.

➡️Let us now write down our first C program. It would simply calculate simple interest for a set of values representing principle, number of years and rate of interest.


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