Chapter 4, Problem 1E

Type in and run the nine programs presented in this chapter. Compare the output produced by each program with the output presented after each program in the text.

Program Plan Intro

“for” condition:

The “for” condition is used to repeat the particular block until some end condition is met.

Syntax:

for (init; condition; increment)

{

//statement

}

Here, “init” is allow the user to declare and initialize any loop control variables. The “condition” is evaluated and “increment” is used to increment the values of the variable.

Explanation of Solution

Program:

Consider the five programs presented in the given chapter.

Program 4.1:

The following program will calculate the eighth triangular number:

//include the header file

#include <stdio.h>

//definition of main method

int main (void)

{

/*declare a variable*/

int triangularNumber;

//calculate the "triangularNumber"

triangularNumber = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8;

//display the result

printf ("The eighth triangular number is %i\n", triangularNumber);

//return statement

return 0;

}

Explanation:

In the above program, declare the variable and calculate the eighth triangular number. Then display the values using “printf” function on the output screen.

Sample Output

Sample Output for program 4.1:

The eighth triangular number is 36