Absolute Beginner's Guide to Programming, Third Edition

C Control Statements

C supports an if...else statement that works a lot like the Visual Basic If...Else statement. Table 13.5 lists the relational operators with which you can compare data.

Table 13.5. C Relational Operators

Relational Operator	Description
==	Equal to
>	Greater than
<	Less than
>=	Greater than or equal to
<=	Less than or equal to
!=	Not equal to

Use braces to group the body of an if statement as shown in the following statement:

if (age < 18)
 { printf("You cannot vote yet\n");
   yrs = 18 - age;
   printf('You can vote in %d years.\n", yrs);
 }
else
{
  printf("You can vote.\n");
}

The individual statements in the if statement end with semicolons, but not the if. The if...else spans several lines, so you don't put semicolons after the ...