প্রোগ্রাম Controls করার পদ্ধতি ও তার সঠিক ব্যবহার

Submitted by administrator on Mon, 01/02/2012 - 15:44

Chapter 10 - Getting Controls

 

In Chapter 7, "Doing the Same Thing Over and Over," you learned to use the for, while, and do-while statements to do the same things over and over. These three statements can be grouped into the looping category that is a part of the control flow statements in C.

In this lesson you'll learn about the statements that belong to another group of control flow statements—conditional branching (or jumping), such as

    The if statement
    The if-else statement
    The switch statement
    The break statement
    The continue statement
    The goto statement



Summary

In this lesson you've learned the following:

  •     An important task of a program is to instruct the computer to jump to a different portion of the code according to the specified branch conditions.
  •     The if statement is a very important statement for conditional branching in C.
  •     The if statement can be nested for making a series of decisions in your program.
  •     The if-else statement is an expansion of the if statement.
  •     The switch statement helps you to keep your program more readable when there are more than just a couple decisions to be made in your code.
  •     The case and default keywords, followed by a colon (:) and an integral value, are used in the switch statement as labels.
  •     The break statement can be used to exit the switch construct or a loop (usually, an infinite loop).
  •     The continue statement is used to let you stay within a loop while skipping over some statements.
  •     The goto statement enables the computer to jump to some other spot in your computer. Using this statement is not recommended because it may cause your program to be unreliable and hard to debug.


 

Related Items

Adding More Expressions into for

Adding More Expressions into for

The C language allows you to put more expressions into the three expression fields in the for statement. Expressions in a single expression field are separated by commas.

The Null Statement

The Null Statement

Looping Under the for Statement

Looping Under the for Statement

The general form of the for statement is

for (expression1; expression2; expression3) {
   statement1;
   statement2;
   .
   .
   .
}

Using Nested Loops

Using Nested Loops

You can put a loop inside another one to make nested loops. The computer will run the inner loop first before it resumes the looping for the outer loop.

Listing 7.7 is an example of how nested loops work.

 

The do-while Loop

The do-while Loop

You may note that in the for and while statements, the expressions are set at the top of the loop. However, in this section, you're going to see another statement used for looping,