在PHP中,可以使用while循环来重复执行一段代码,直到指定的条件不再满足为止。while循环的条件设置在while关键字后的括号内。条件通常是一个布尔表达式,如果这个表达式的值为真,循环会继续执行;如果为假,循环会停止执行。例如: $count = 0; while ($count < 5) { echo "The count is: " . $count . ""; ...
ExampleGet your own PHP Server Print $i as long as $i is less than 6: $i = 1; while ($i < 6) { echo $i; $i++; } Try it Yourself » Note: remember to increment $i, or else the loop will continue forever.The while loop does not run a specific number of times, but ...
在PHP中,do-while循环和while循环都是用于重复执行代码块的循环结构。它们之间的主要区别在于循环执行的时机。 do-while循环会先执行一次代码块,然后在检查条件是否满足之前继续执行循环。换句话说,do-while循环保证至少会执行一次代码块。 而while循环在每次循环开始之前都会先检查条件是否满足,如果条件不满足,则循环体...
Example 2: do...while loop // Program to add numbers until the user enters zero #include <stdio.h> int main() { double number, sum = 0; // the body of the loop is executed at least once do { printf("Enter a number: "); scanf("%lf", &number); sum += number; } while(...
问PHP如何通过while循环进行WhileloopENC#程序的三大结构 顺序结构：程序的入口都是Main函数，代码从上...
In Python, we use awhileloop to repeat a block of code until a certain condition is met. For example, number = 1 while number <= 3: print(number) number = number + 1 Output 1 2 3 In the above example, we have used awhileloop to print the numbers from1to3. The loop runs as...
The basic loop structure in Python is while loop. Here is the syntax.Syntax:while (expression) : statement_1 statement_2 ...The while loop runs as long as the expression (condition) evaluates to True and execute the program block. The condition is checked every time at the beginning of...
While loop Posted by:João Abrantes Date: September 16, 2008 08:50AM hello everyone. i have a program that is in a while loop using the select command to read a table from sql. conn = MySQLdb.Connect(host='localhost', user='root', db='database', passwd='password')...
在while-loop之后,代码不再继续 我想输出这段代码中删除的字符: if(c=='a') {} printf("Enter a string\n"); int del = 0; while 浏览2提问于2012-11-25得票数 1 1回答 java.lang.illegalstateexception无法转发。响应已提交jsp 、 );{ Iterator it = fields.iterator();} }{ log.printOut("[...
Uh, I'm trying to do the natural thing I know from various programming languages: run a loop to repeat a computation; I'm handling the table line by line. I am still trying to wrap my head around how to handle whole chunks of a table in one go. > You have an hourly table of...