PHP数三退1
PHP数3退1
<?php$sum = 10;for ($i = 0; $i < $sum; $i++){ $arr[$i] = true; } $count = count($arr); $io = 0; $index = 0; while($count > 1){ if($arr[$index]==true){ $io++; if($io==3){ $count --; $io = 0; $arr[$index]=false; } } $index ++; if($index==count($arr)){ $index = 0; } } for( $i=0; $i<count($arr); $i++){ if($arr[$i]==true){ print_r($i); } }?>
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What file is index.html?
Feb 19, 2024 pm 01:36 PM
index.html represents the home page file of the web page and is the default page of the website. When a user visits a website, the index.html page is usually loaded first. HTML (HypertextMarkupLanguage) is a markup language used to create web pages, and index.html is also an HTML file. It contains the structure and content of a web page, as well as tags and elements used for formatting and layout. Here is an example index.html code: <
How to write if in c language to judge multiple conditions
Mar 25, 2024 pm 03:24 PM
In C language, if statement is usually used to execute a specific block of code based on a single condition. However, multiple conditions can be combined to make a determination using logical operators such as &&, ||, and !. Including using logical AND (&&) to judge multiple conditions, using logical OR (||) to judge at least one condition, using logical NOT (!) to judge the negation of a single condition, as well as nesting if statements and using parentheses to clarify priority.
The difference between counta and count
Nov 20, 2023 am 10:01 AM
The Count function is used to count the number of numbers in a specified range. It ignores text, logical values, and null values, but counts empty cells. The Count function only counts the number of cells that contain actual numbers. The CountA function is used to count the number of non-empty cells in a specified range. It not only counts cells containing actual numbers, but also counts the number of non-empty cells containing text, logical values, and formulas.
How to use if nested statements in MySQL stored procedures
May 26, 2023 pm 12:07 PM
1. Introduction to if statement The if statement is a branching structure statement that performs different operations according to conditions. The if statement usually consists of a conditional expression and one or more statements. If the value of the conditional expression is true, then the statements in the if statement are executed; otherwise, the if statement block is skipped. The syntax of the if statement is as follows: if(condition)thenstatement;elsestatement;endif; where condition is the conditional expression and statement is the SQL statement that needs to be executed. 2. Introduction to if nested statements An if nested statement refers to nesting one or more if statement blocks within an if statement block to perform different operations based on different conditions.
How to use if statement in Python?
Apr 20, 2023 pm 11:40 PM
How to use the if statement in Python The if statement is used to express a possible situation and how to handle the situation. The if statement can be used to express one possibility, two possibilities, or multiple possibilities. 1 A possibility A single if statement represents a possibility. The if keyword is followed by an expression. When the expression is True, it means that this situation has occurred, and the specified statement is executed, that is, the situation is handled, as shown in the figure 1 shown. Figure 1 The use of a single if statement. Figure 1① Use the input() function to receive the value input by the user, convert it into int type and save it in a variable; Figure 1② Use the if statement to judge the variable x. If the value of x is greater than 0, the message "You entered a non-negative number" is output (
Detailed explanation of the meaning of true in PHP functions
Mar 16, 2024 am 08:57 AM
Detailed explanation of the meaning of true in PHP function In PHP, true is a Boolean value, representing the state of "true" or "yes". Using true in a function is usually used to express that a condition is true or to return a success status. This article will explain in detail the meaning of true in PHP functions from different perspectives, and give specific code examples. 1. Conditional judgment when true is returned: In PHP functions, true is usually used in conditional judgment to indicate that the condition is true. For example: functioni
What does true mean in PHP function?
Mar 16, 2024 pm 12:12 PM
Title: What does true mean in PHP functions? In PHP programming, true represents true in a Boolean value, usually indicating the state of "true". When true is used in a function, it is usually used to determine whether a condition is true or to perform some operation. The following will use specific code examples to illustrate what true means in PHP functions. example:
PHP source code running problem: index error solution
Mar 09, 2024 pm 09:24 PM
PHP source code running problem: Index error resolution requires specific code examples. PHP is a widely used server-side scripting language that is often used to develop dynamic websites and web applications. However, sometimes you will encounter various problems when running PHP source code, among which "index error" is a common situation. This article will introduce some common causes and solutions of index errors, and provide specific code examples to help readers better deal with such problems. Problem Description: When running a PHP program
