publicclassIncrementByTwo{publicstaticvoidmain(String[]args){for(inti=0;i<10;i+=2){System.out.println("当前的值是:"+i);}}} 1. 2. 3. 4. 5. 6. 7. 在上面的代码中,我们初始化变量i的值为0,然后设置条件i < 10,每次循环结束后通过i += 2来更新i的值。循环体中打印出当前的值。 当执...
for(初始化initialization; 循环条件condition; 递增/递减increment/decrement) { statement(s); } for循环的执行流程 当程序在运行的时候,解释器一直在跟踪要执行的语句,我们称之为控制流,或者程序的执行流程。 第一步:在for循环中,首先进行初始化,在整个for循环中,初始化部分的语句只在开始的时候执行一次。 第二...
For example, we can rewrite the previous example as below. We have taken out thecounterinitialization before the loop. We have moved the counter increment and the termination statements inside the loop body. The statements are the same as the previous version. int[]array=newint[]{0,1,2,3,...
Let’s start looking at the for loop evolution over different java releases. 让我们开始研究不同Java版本上的for循环演变。 (Basic for loop) Main elements of, “for” loop are initialization, termination condition, and loop increment logic. Let’s see a sample here: “ for”循环的主要元素是初...
loop changes the value of num by incrementing it by 1. Next, the condition, num <= 10, included in the while statement is evaluated. If the condition is met, the instructions in the loop are repeated. If the condition is not met (that is, when the value of num becomes 11), the ...
loop--循环开始dbms_output.put_line(i);--输出语句i :=i+1;exitwheni=10;endloop;--循环结束end;--结束部分 案例2:while循环语法: while 条件 loop 执行的语句; end loop; declare--声明部分inumber;begin--代码开始i :=1;whilei<20loop--循环开始dbms_output.put_line(i);--输出语句i :=i+1;...
Expression 3 can do anything like negative increment (i--), positive increment (i = i + 15), or anything else.Expression 3 can also be omitted (like when you increment your values inside the loop): Example let i = 0; let len = cars.length; let text = ""; for (; i < len; ...
for (initialization;termination;increment) {statement(s)} When using this version of theforstatement, keep in mind that: Theinitializationexpression initializes the loop; it's executed once, as the loop begins. When theterminationexpression evaluates tofalse, the loop terminates. ...
increment) { statement(s) } 使用该版本的for语句时,要记住: 初始化语句初始化循环;它执行一次作为循环的开始。 当结束表达式计算为false,循环结束。 自增表达式会在循环的每次迭代执行;该表达式在增量器,递减值,是完全可以接受的, 接下来的程序ForDemo,使用for语句的通用形式,输出1到10到标准输出: ...
Altho the enhancedforloop can make code much clearer, it can't be used in some common situations. 使用For-each时对collection或数组中的元素不能做赋值操作 Only access. Elements can not be assigned to, eg, not to increment each element in a collection. ...