Programming in C

44 Chapter 5 Program Looping
Program 5.1
Continued
int main (void)
{
int triangularNumber;
triangularNumber = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8;
printf ("The eighth triangular number is %i\n",
triangularNumber);
}
return 0;
Program 5.1 Output
The eighth triangular number is 36
One of the fundamental properties of a computer is its ability to repetitively execute a
set of statements.These looping capabilities enable you to develop concise programs containing
repetitive processes that could otherwise require thousands or even millions of
program statements to perform.The C programming language contains three different
program statements for program looping.They are known as the for statement, the
while statement, and the do statement. Each of these statements are described in detail
in this chapter.
The for Statement
Let’s dive right in and take a look at a program that uses the for statement.The purpose
of Program 5.2 is to calculate the 200th triangular number. See if you can determine
how the for statement works.
Program 5.2 Calculating the 200th Triangular Number
/* Program to calculate the 200th triangular number
Introduction of the for statement */
#include
int main (void)
{
int n, triangularNumber;
triangularNumber = 0;