class IfStatement { public static void main(String[] args) { int number = 10; //检查数字是否大于0 if (number > 0) { System.out.println("这个数字是正数。"); } System.out.println("该语句始终被执行。"); } } 输出: 这个数字是正数。该语句始终被执行。
IF condition THEN statement; END IF; 1. 2. (2) IF...ELSE...结构语法结构: IF condition THEN statements ; ELSE statements; END IF; 1. 2. 3. (3)IF...ELIF...结构 IF condition THEN statements; ELIF condition2 THEN statements; ... [ELSE statements;] END IF; 1. 2. 3. 4. 5. ...
使用if语句的时候进行判断如果是进行数值类的 ,建议使用 let(())进行判断 对于字符串等使用test[ ] or [[ ]] 进行判断 (())中变量是可以不使用$来引用的 example:表述数字范围的时候 可以使用if可以是使用case if [ $x -gt 90 -o $x -lt 100 ] case $x in 100) 9[0-9]) if [ "X$name" ...
a)if语句b)嵌套if语句c)if-else语句d)if-else-if语句if语句if语句包含条件,后跟语句或一组语句,如下所示:if(condition){ Statement(s); } Java Copy只有在给定条件为真时才会执行语句。如果条件为false,那么if语句体内的语句将被完全忽略。if语句的示例...
if (isMoving){ // the "then" clause: decrease current speed currentSpeed--; } } If this test evaluates tofalse(meaning that the bicycle is not in motion), control jumps to the end of theif-thenstatement. In addition, the opening and closing braces are optional, provided that the "the...
Java 提供了一个特别的三元运算符(也叫三目运算符)经常用于取代某个类型的 if-then-else 语句。条件运算符的符号表示为“?:”,使用该运算符时需要有三个操作数,因此称其为三目运算符。具体说明如下: result=<expression>?<statement1>:<statement2>; ...
publicclassIfStatementExample { publicstaticvoidmain(String args[]){ intnum=70; if( num <100){ /* This println statement will only execute, * if the above condition is true */ System.out.println("number is less than 100"); }
1) if-then-else statement if (boolean expression) { branch if true} // {} optional for single statement, but necessary for multiple lines. else if (boolean expression) {branch if true} // {} optional for single statement, but necessary for multiple lines. ...
if(Boolean-expression)“statement” 或 代码语言:javascript 代码运行次数:0 运行 AI代码解释 if(Boolean-expression)“statement”else“statement” 布尔表达式(Boolean-expression)必须生成boolean类型的结果,执行语句statement既可以是以分号;结尾的一条简单语句,也可以是包含在大括号{}内的的复合语句 —— 封闭在大...
If the stream is already closed then invoking this method has no effect.As noted in AutoCloseable#close(), cases where the close may fail require careful attention. It is strongly advised to relinquish the underlying resources and to internally mark the Closeable as closed, prior to throwing ...