Loadand display the fileifelse.cfor an example of our first conditional branching statement,
the "if"./* This is an example of the if and if-else statements */
main()
{
int data;
for(data = 0;data < 10;data = data + 1) {
if (data == 2)
printf("Data is now equal to %d\n",data);
if (data < 5)
printf("Data is now %d, which is less than 5\n",data);
else
printf("Data is now %d, which is greater than 4\n",data);
} /* end of for loop */
}
Notice first, that there is a "for" loop with a compound statement as its executable part containing two "if" statements. This is an example of how statement can be nested. It should be clear to you that each of the "if" statements will be executed 10 times. Consider the first "if" statement. It starts with the keyword "if" followed by an expression in parentheses. If the expression is evaluated and found to be true, the single statement following the "if" is executed. If false, the following statement is skipped. Here too, the single statement can be replaced by a compound statement composed of several statements bounded by braces. The expression "data" == 2" is simply asking if the value of data is equal to 2, this will be explained in detail in the next chapter. (Simply suffice for now that if "data = 2" were used in this context, it would mean a completely different thing.)
the "if"./* This is an example of the if and if-else statements */
main()
{
int data;
for(data = 0;data < 10;data = data + 1) {
if (data == 2)
printf("Data is now equal to %d\n",data);
if (data < 5)
printf("Data is now %d, which is less than 5\n",data);
else
printf("Data is now %d, which is greater than 4\n",data);
} /* end of for loop */
}
Notice first, that there is a "for" loop with a compound statement as its executable part containing two "if" statements. This is an example of how statement can be nested. It should be clear to you that each of the "if" statements will be executed 10 times. Consider the first "if" statement. It starts with the keyword "if" followed by an expression in parentheses. If the expression is evaluated and found to be true, the single statement following the "if" is executed. If false, the following statement is skipped. Here too, the single statement can be replaced by a compound statement composed of several statements bounded by braces. The expression "data" == 2" is simply asking if the value of data is equal to 2, this will be explained in detail in the next chapter. (Simply suffice for now that if "data = 2" were used in this context, it would mean a completely different thing.)
