'C' is case sensitive language. It differentiates between characters written in lower case and character written in upper case. The program you have typed is also known as source code. In a program many lines of code can be written. In a 'C' program each statement is required to end with semicolon (;). A single statement can be split over multiple lines. 'C' is procedural language and each 'C' program must have function name ‘main’. The program execution starts from this function. T he statements within a function are always enclosed within opening curly bracket and closing curly bracket.
