C while 循环 C 循环 只要给定的条件为真,C 语言中的 while 循环语句会重复执行一个目标语句。 语法 C 语言中 while 循环的语法: while(condition) { statement(s); } 在这里,statement(s) 可以是一个单独的语句,也可以是几个语句组成的代码块。condition 可
C while tutorial shows how to create loops in C with while statement. A while loop is a control flow statement that allows code to be executed repeatedly based on a given boolean condition.
-> leave loop_label; -> end if; -> end loop; -> end;// Query OK, 0 rows affected (0.00 sec) 从上面这个例子可以看出,使用LOOP编写同样的循环控制语句要比使用while和repeat编写的要复杂一些:在循环内部加入了IF……END IF语句,在IF语句中又加入了LEAVE语句,LEAVE语句的意思是离开循环,LEAVE的格式是...
while是循环流程控制，使用的标准格式为 while(表达式){ 循环语句体；} 说明：①while循环的表达式是循环进行的条件，用作循环条件的表达式中一般至少包括一个能够改变表达式的变量，这个变量称为循环变量 ②当表达式的值为真（非零）时，执行循环体；为假（0）时，则循环结束 ③当循环体不需要实现任何...
Thank you so much! I had been looking so long for a proper C tutorial for beginners. Your explanations and examples make it so much easier to understand. avanish singhonOctober 13th, 2013: hi, sir i want a loop statement then are perform a working ...
do { // body of loop; } while (condition); Here, The body of the loop is executed at first. Then the condition is evaluated. If the condition evaluates to true, the body of the loop inside the do statement is executed again. The condition is evaluated once again. If the condition ...
Here, the initialization statement is executed first and only once. The test condition is checked, if false the loop terminates If the test condition is true, the body of the loop executes The update expression gets updated Again the test condition is evaluated The process repeats until the tes...
但是对于do…while语句,第一个节点对应的是大括号里面的STATEMENT, 第二个节点才是用于判断循环是否结束的条件判断语句。 对两个循环语句的解释执行还是落在StatementExecutor的实现中: public class StatementExecutor extends BaseExecutor{ private enum LoopType {...
CppCoreGuidelines ES.73:Prefer a while-statement to a for-statement when there is no obvious loop variable 360 safe rules: for语句没有明确的循环变量时应改用while句语 这是为什么呢?在较为严格的规范体系内,for 语句专用于实现具有明确循环次数和循环变量的迭代算法,小括号内的三个表达式应分别专注于循...
PUT_LINE('逗号数量:' || SIGNS); --赋最大值 SI_MAX := SIGNS; --循环拼接SQL WHILE SIGNS > 0 LOOP --取当前字段 SELECT SUBSTR(STR,1,INSTR(STR,',') - 1 ) INTO CURRENT_VALUE FROM DUAL; --在待拼接的字段里删除当前字段 SELECT SUBSTR(STR,INSTR(STR,',') + 1) INTO STR FROM DUAL...