
Concept explainers
Type in and run the nine programs presented in this chapter. Compare the output produced by each

“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 for program 4.1:
The eighth triangular number is 36
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