Numerical function is one of the commonly used functions, and it is also a must for learning mysql. The commonly used ones are as follows: 1. ceil: returns the smallest integer value greater than a certain number: 2. floor: opposite to the previous one, returns less than a certain number The maximum integer value of the number: 3. Round: Returns the rounded value of a certain value: As shown above, the second parameter of round represents the number of decimal places that need to be retained. 4. Truncate: Returns the truncated value of a certain value: The difference here from round is that regardless of the decimal place that needs to be retained, it will be discarded directly. The same second parameter represents the decimal place that needs to be retained. Note: The above examples are all integers, but these functions can also handle negative numbers in the same way. There are more than these numerical functions, but I personally think these are more commonly used, so only these are recorded. Numerical function is one of the commonly used functions, and it is also a must for learning mysql. The commonly used ones are as follows: 1. ceil: returns the smallest integer value greater than a certain number: 2. floor: opposite to the previous one, returns less than a certain number Maximum integer value: 3. round: Returns the rounded value of a certain value: As above
1. Recommended 10 articles about the php ceil() function
Introduction: Numerical function is one of the commonly used functions, and it is also a must for learning mysql. The commonly used ones are as follows: 1. ceil: Returns the smallest integer value greater than a certain number: 2. Floor: Contrary to the previous one, returns the largest integer value less than a certain number: 3. Round: Returns the rounded value of a certain number: As shown above, the first of round The two parameters represent the number of decimal places that need to be retained. 4. Truncate: Returns the truncated value of a certain value: The difference here from round is that no matter what one decimal place needs to be retained after it...
2. Detailed explanation of usage analysis of true division and Floor division in Python3
##Introduction: This article mainly This article introduces the usage of true division and Floor division in Python3, and analyzes the differences and usage techniques between true division and Floor division with examples. Friends in need can refer to
##3.mysql Commonly Used Basic Operation Syntax (12)~~Commonly Used Numerical Functions [Command Line Mode]
4.
MySQL Numeric Operators and Functions
## Introduction: For ordinary addition and subtraction operations, details will not be given here. To explain, take the following example: mysql> SELECT 3+4;+-----+| 3+4 |+-----+| 7 |+-----+1 row in set (0.03 sec)CEIL and FLOORCEIL are rounded up. As long as there are decimal places, no matter how many, they are directly entered into one place. For example: mysql> SELECT CEIL(3.01);
5.
js operation rounding and string segmentationIntroduction: [Rounding] ①parseInt (parse the integer, discard the decimal part, keep the integer part) Syntax: var a =parseInt(5/2); console.log (a) Output 2 ②Math.ceil (round up, if there is a decimal, add 1 to the integer part) Syntax: Math.ceil(5/2) Output 3 ③Math.round (rounded) Syntax: Math.round(5/2) Output 3 ④Math.floor (round down) Math.floo...
6.
JS operation rounding and string segmentationIntroduction: [Rounding] ①parseInt (parse the integer, discard the decimal part, keep the integer part) Syntax: var a =parseInt(5/ 2); console.log(a) Output 2 ②Math.ceil (round up, if there is a decimal, add 1 to the integer part) Syntax: Math.ceil(5/2) Output 3 ③Math.round (rounding) Syntax: Math.round (5/2) Output 3 ④Math.floor (round down) Math.floo... 7. python round up ceil round down floor round round Introduction: python round up ceil round down floor round 8. About the problem of sprintf intercepting decimals Introduction: Problem: Keep 1 decimal place, not rounded, and add a lot of 0s when it is an integer People say to use sprintf('%.1f',$str);, but there are still problems with the results. Finally, this method is used to solve the problem: echo sprintf('%.1f', floor($str)); { Code...} Didn't it say that there is no rounding? Why... 9. About sprintf intercepting decimals Introduction: Problem: Keep 1 decimal place , do not round, and add 0 when it is an integer. Many people say to use sprintf('%.1f',$str);, but there are still problems with the results. Finally, this method is used to solve the problem: echo sprintf('%.1f ', floor($str)); {Code...} Didn't it say there is no rounding? Why... #10. PHP floor function problem. Introduction:: This article mainly introduces the floor function problem of PHP. , students who are interested in PHP tutorials can refer to it. [Related Q&A recommendations]: What does "20/3 | 1" mean in javascript - js. php - Find a regular expression
The above is the detailed content of 10 recommended articles about the php floor() function. For more information, please follow other related articles on the PHP Chinese website!

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。


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