CONDITIONAL STATEMENT

          This is a programming language statement that selects an execution path based on whether some condition is true or false.

IF/ ELSE STATEMENT

          Using if/ else, one block of code is executed if the control expression is true and another block is executed if the control expression is false.

          ex.   

          if (x==100)

          cout<<"x is 100";

          else

          cout<<"x is not 100";

The if else structures can be concatenated with the intention of verifying a range of value.

          ex.

          if (x>0)

          cout<<"x is positive";

          else if (x<0)

          cout<<"x is negative";

          else

          cout<<"x is 0";

NESTED IF/ ELSE

           Nesting If/ else statement means that you put another if/ else

statement within the true side or false side of another if/else statement.

        Here is an example program:

                                 int grade,income;
                  cout<<"Enter grade of Students: ";
                  cin>>grade;                     
                  cout<<"Enter Monthly Income: ";
                  cin>>income;
                  if(grade>=85)
                  {
                      if(income<=10000)
                      cout<<"Qualified!!";
                      else
                      cout<<"Not Qualified!";
                  }
                  else
                  cout<<"Not Qualified!";