在使用loop的时候,使用到的labels标号,对于labels可以用到while,loop,rrepeat等循环控制语句中。而且有必要好好认识一下lables!! mysql> create procedure pro13() -> label_1:begin -> label_2:while 0=1 do leave label_2;end while; -> label_3:rep
[begin_label:] WHILE search_condition DO statement list END WHILE [end label] search_condition 参数表示循环执行的条件,满足该条件时循环执行; statement_list 参数表示循环的执行语句。WHILE 循环需要使用 END WHILE 来结束。 LOOP 语句 LOOP 语句可以使某些特定的语句重复执行。与 IF 和 CASE 语句相比,LOOP...
('1+2+3+...+10='||v_s); END; / 2.WHILE 循环 WHIEL condition LOOP statement; END LOOP; --下面使用while...循环完成loop循环中的示例 DECLARE v_s NUMBER:=0; v_n NUMBER:=1; BEGIN WHILE v_n<=10 LOOP v_s:=v_s+v_n; v_n...[reverse] lowest_number ..highest_number LOOP ...
[ELSE statement_list] END IF; 1. 2. 3. 4. 参数: Expr_condition:表示判断条件 Statement_list:表示SQL语句列表,它可以包括一个或多个语句 注意事项: if以end if结尾 如果,expr_condition求值为TRUE,相应的SQL语句列表就会被执行,如果,没有expr_condition匹配,则ELSE子句李的...
Python While Loop with Else In Python, we can also use the else statement with loops. When the else statement is used with the while loop, it is executed only if the condition becomes false. Example: Python 1 2 3 4 5 6 7 a = 1 while a < 5: print("condition is true") a =...
To programmatically exit the loop, use a break statement. To skip the rest of the instructions in the loop and begin the next iteration, use a continue statement. When nesting a number of while statements, each while statement requires an end keyword. The MATLAB while loop is similar to a...
We use the cout statement inside the while loop to print the statement 'You are unstoppable. After the statement gets printed for the first time, the value of i then becomes 2 because of the update expression (i++). The program again checks the condition, which is true, and the statemen...
To programmatically exit the loop, use a break statement. To skip the rest of the instructions in the loop and begin the next iteration, use a continue statement. When nesting a number of while statements, each while statement requires an end keyword. The MATLAB while loop is similar to a...
while循环和for循环都是入口条件循环,即在循环的每次迭代之前检查测试条件,所以有可能根本不执行循环体中的内容.C语言还有出口条件循环(exit-condition loop),即在循环的每次迭代之后检查测试条件,这保证了,至少执行循环体中的内容一次.这种循环被称为do while循环. 下面是do while循环的通用形式: do statemnet while...
2. Awk Do While Loop Example: Print the message at least once $ awk 'BEGIN{ count=1; do print "This gets printed at least once"; while(count!=1) }' This gets printed at least once In the above script, the print statement, executed at least once, if you use the while statement,...