if (condition) { statements; } else { statements; } if (condition) { statements; } else if (condition) { statements; } else{ statements; } 注意:if语句总是用"{"和"}"括起来,避免使用如下容易引起错误的格式: if (condition) //AVOID! THIS OMITS THE BRACES {}! statement; 7.5 for语句(for...
There are four types of if statement in Java: Java中有四种类型的if语句: if statement 如果声明 if-else statement if-else语句 if-else-if ladder if-else-if梯子 nested if statement 嵌套if语句 (if Statement) The if statement is a single conditional based statement that executes only if the pro...
else if (!expr) Creates a negated if statement for for (T item : expr) Creates a for statement fori for (int i = 0; i < expr.length; i++) Creates a for statement which iterates over an array forr for (int i = expr.length-1; i >= 0; i–) Creates a for statement which...
if (condition) //AVOID! THIS OMITS THE BRACES {}! statement; 7.5 for语句(for Statements) 一个for语句应该具有如下格式: for (initialization; condition; update) { statements; } 一个空的for语句(所有工作都在初始化,条件判断,更新子句中完成)应该具有如下格式: ...
Use else if to specify a new condition to test, if the first condition is false Use switch to specify many alternative blocks of code to be executedThe if StatementUse the if statement to specify a block of Java code to be executed if a condition is true.Syntax...
} else { statements; } Note:ifstatements always use braces,{}. Avoid the following error-prone form: Copy Copied to Clipboard Error: Could not Copy if (condition) //AVOID! THIS OMITS THE BRACES {}!statement; 7.5 for Statements Aforstatement should have the following form: ...
if语句后面的else语句不是必须的。 假如if语句或else语句的程序代码块中包括多条语句,则必须放在大括号内;如果程序代码块中只有一条语句,可以不用大括号。 if-else语句的一种特殊的串联编程风格为: if(expression){ statement1 }elseif(expression2){
if(a>1){if(b>2){b=5;}}else{b=4;} 我们编译间套里面的if else时,把内部的ifelse对应的分支名称在前面加上i,比如一层间套,那么它对应的就是ibranch0,两层就是iibranch0,同理一层间套对应iout_branch0,两层就是iiout_branch0. 由于存在间套原因,ifelse语句编译比较困难,且容易出错。我们看看实现...
The switch statement Theswitchstatement is a selection control flow statement. It allows the value of a variable or expression to control the flow of a program execution via a multi-way branch. It creates multiple branches in a simpler way than using the combination ofifandelse ifstatements. ...
Java continue Statement Java if...else Statement Nested Loop in Java Java switch Statement The switch statement allows us to execute a block of code among many alternatives. Syntax: switch (expression) { case value1: // code break; case value2: // code break; ... ... default: /...