Relational operators are good at comparing two quantities. However, relational operators does not support comparison of three or more quantities.

For example, suppose you need to check range of a number. You need to check whether a number n is in between 1-100 or not. For that you must check two conditions, first check if n > 1 finally check if n < 100.

We use logical operators to combine two or more relational expressions as a single relational expression. Logical operators evaluates a Boolean value (integer in case of C) depending upon the operator used.

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In real life, we often compare two different quantities and depending on their relation, we take some decisions. For example, we compare the price of two items, age of two persons etc. Relational operators supports these comparisons in C programming.

We use relational operators to compare two constants, variables or expressions. We generally compare two quantities of similar nature. Likewise, relational operators can only compare any two similar types. It evaluates Boolean value either true or false depending on their relation. Based on evaluated Boolean result we take decisions or execute some statements.

In C programming, there is no concept of Boolean values. C represents false with 0 and true with a non-zero integer value.

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Assignment operator is used to assign value to a variable (memory location). There is a single assignment operator = in C. It evaluates expression on right side of = symbol and assigns evaluated value to left side the variable.

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Arithmetic operators are used to perform basic arithmetic operations. Operations like addition, subtraction, multiplication, division and modulo division.

C supports five arithmetic operators.

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Every C program is developed using five fundamental units keywords, identifiers, operators, separators and literals. In previous post, we already learned about keywords and identifiers. Here in this post we will focus on operators and separators.

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In previous post, we executed our first C program. That was interesting and a stepping-stone towards complex C programs.

A C program consists of various programming elements. These programming elements are the building blocks of any simple or complex application. Programming elements such as keyword, identifier, operator, expression, constant etc.

In this section and subsections, I am will cover all fundamental programming elements of a C program.

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In the series of C tutorial we learned some basic of C programming language, configured C compiler and learned to compile and execute C program.

Since the compilation and execution of first C program, I must answer few questions before moving ahead. Questions such as – what is meant by compilation, what happens during compilation, how a simple plain text file gets converted to executable binary file.

In this post I will take a deep dive into the C compilation process. So let’s begin.

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Before reading this post, I hope you are equipped with required software’s to run a C program. If not please first set up your C lab before writing, compiling and running a C program.
After you have installed and configured all essential software’s you can continue to first C program.

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