Chapter 5, Problem 1RQE

Why should you indent the statements in the body of a loop?

Explanation of Solution

Reason for statement indention:

Some of the reasons for “indenting C++ statements in the body of a loop” are:

• The body of a loop contains C++ statements and it gets executed once the expression is valid. Otherwise it won’t execute.
• Multiple loop statements are enclosed by braces ({}) and should be intended, because, it separates the condition statements from surrounding code.
• Hence, it helps the programmer to easily identify the statements that are conditionally-executed.

Example:

Consider the following example program contains conditionally-executed statements:

Program code:

//Include required header files

#include <iostream>

#include<iomanip>

using namespace std;

//Main function

int main()

{

//declare the variable “n” as integer set “n” as 5

int n = 5;

//loop i values for 5 times

for (int i = 1;i <= n;i++)

{

//check the number is even

if (i % 2 == 0)

{

//if so, display it

cout << "\n"<<i<<" is even";

}

}

cout << endl;

return 0;

}

The highlighted statements are indented within the loop.

Sample Output

2 is even

4 is even