C programs were always portable from case compiler to another. Every C program must have a function called main. Multiplication and division have the same operator precedence. Suppose that count is an int variable. The statements ++count; and count++; both increment the value of count by 1. Suppose that alpha and beta are int variables. The statement alpha = beta++; is equivalent to the statement alpha = ++ beta; All preprocessor statements start with the symbol #. C comes with a wealth of functions, called predefined functions, that are written by other programmers. Every if statement must have a corresponding else. In switch statement. every case must have a break. Loop control variables are automatically initialized in a loop. A sentinel-controlled while loop is an event-controlled while loop whose termination depends on a special value. The body of a do while loop may not execute at all you write end properly debug a function, you can use it in the program (or different programs) and again without having to rewrite the same code repeatedly. printf always begins printing at the beginning of a new line cause the computer to display the text after II on the screen when the program is sequence when used in a printf format control string causes the cursor to position of the next line on the screen must be defined before they're used must be given a type when they're defined that prints three lines of output must contain three printf statements operators/, %, + and - all have the same level of precedence