Statements

STATEMENTS

A statement in a computer program carries out some action. There are three type of statements used in C++; they are expression statement, compound statement, and control statement.

(i)   Expression statement  An expression statement consists of any valid C++ expression followed by a semicolon. The expression statement is used to evaluate a group of expressions.

    For example,

          x = y;  / / the value of y is copied to variable x

          sum = x+y / / the value of x is added with the value of y

                            / / and then assign to the variable sum     

(ii)  Compound statement   A group of valid C++ expression placed within a { and } statement is called a compound statement. The individual statement may be of an expression statement, a compound statement or even a control statement. Note that the compound statement is not completed with a semicolon.

     For example,

         {

                  a = b+c

                  x = x*y

                  y = a+x

         }

(iii) Control statement   The control statement is used for the program flow and to check the conditions of the given expression or a variable constant. The keywords of the control statements are normally a predefined or reserved words and programmer may not use them a ordinary variables.

  For example,

    (1)

          if   (a >b)   {

                                     

          }

   (2)

          while   (condition is becoming true)   {

        

                          

         }