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Let us take an example given below:

                 void main()
                 {
                 int age;
                 cout<<”Enter you age: “;
                 cin>>age;
                 if (age < 18)

                 {
                 cout << “You are eligible to vote.”;
                 }
                 cout<<”Outside the if statement”;

                 }
                 In the preceding code, if the value in age of less than 18, the statement written inside the if
                 statement is executed. Otherwise, C++ skips the entire block and continues with the program.
                 Program1: To take a number from the user as input and print the cube of it. Show a message

                 “Too Large Number”, if user enters a number greater than 20.
                 #include<iostream.h>
                 #include<conio.h>
                 void main()

                 {
                 int n, cu;
                 cout<<”Enter a number less than 21: “;
                 cin >> n;
                 if (n <= 20)
                 {

                 cu = n * n * n;
                 cout<<”The cube of “<< n << “ is: “ << cu;                             Output 1:
                 }                                                                      Enter a number less than 21: 20
                 if (n > 20)                                                            The cube of 20 is: 8000

                 {                                                                      Output 2:
                 cout<<”Too Large Number”;                                              Enter a number less than 21: 25
                 }                                                                      Too Large Number
                 getch();
                 }

                     THE IF…ELSE STATEMENT

                 The if…else statement checks for a condition. If the condition evaluates to True, the statement(s)
                 in the if block is executed, otherwise the statements in the else block is executed.





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