https://www.tutorialspoint.com/cprogramming/c_decision_making.htm
[ C – Decision Making ]
Show below is the general form of a typical decision making structure found in most of the programming languages −
※ if는 Keyword임 <- Visual Studio에서 나오는 색깔을 보니
if(boolean_expression) {
/* statement(s) will execute if the boolean expression is true */
}