The syntax of an if statement is if (condition) true_statement; else false_statement;. Where the else false_statement; is optional. ... <看更多>

Yes, you are right. It will use the old value when evaluating the conditional. All the statements are evaluated in order, but none of the ... ... <看更多>

1.if–else语句. 其格式与C语言中的if–else语句类似，使用方法有以下3种： ... ... <看更多>