round function

In this report, it is found that the report calculation results are different from the data in the customer's original report. because the other party has strict requirements on data accuracy, the report is not sloppy. After multiple comparisons, it

How to compare and integer inaccuracy of floating point numbers in PHP Comparison of floating point calculation resultsAn example of floating point number calculation is as follows:   The Code is as follows: $ A = 0.2 + 0.7; $ B = 0.9; Var_dump ($ a

 AbsABS (number): Returns the absolute value of the specified digit. An absolute value is a numeric value that has no sign.Number: Any real number that requires an absolute value.Example:ABS (-1.5) equals 1.5.ABS (0) equals 0.ABS (2.5) equals

Off- topic: Personally think DES encryption and decryption is really a lengthy process, s box, p box and a variety of transformations to make people dazzling. A Feistel Password structureFirst of all, the reason for the Feistel cipher structure is

In Excel tables, the number of digits is processed, and the number of digits you specify is often rounded as needed. Numeric rounding can be done with the following functions: Rounding =round (a1,0) Truncate decimal rounding =rounddown (a1,0)

Comparison of calculation results of floating point numbersA floating-point count example is as follows: Copy Code code as follows: $a = 0.2+0.7; $b = 0.9; Var_dump ($a = = $b); The result is: BOOL (false). In other

Method One sprintf () function, the sprintf () function writes the formatted string to a variable The code is as follows Copy Code $num = 123213.666666;Echo sprintf ("%.2f", $num); Example 2 The

The floor function and the Ceil function match each other to make PHP processing data more authentic and reliable. First, look at the floor function: Grammar: Float floor (float value) Description Returns the next integer not more than value,

First, the SQL Aggregate function:The SQL Aggregate function calculates the value obtained from the column and returns a single value.1. AVG () functionThe AVG () function returns the average of a numeric column.Syntax: SELECT AVG (column_name) from

Original address: http://blog.csdn.net/skyandcode/article/details/23523815Problem:The float Momey type in the database will be accurate to many decimal places. But sometimes we don't need to be that precise, for example, to only be accurate to two

This article summarizes the usual SQL statements and the subtleties of some Oracle functions. Welcome everyone to supplement the usual most commonly used SQL statement, for everyone to learn reference.? 1 2 3 4 5 6 7 8 9 10 11 12 13 1

1. Get user input?? To write a program that has real value, you need to interact with the user. Of course, there are many ways to interact with the user, for example, the GUI (graphical user interface) is a very good way to interact with the user,

1. Get user inputTo write a program that has real value, you need to interact with the user. Of course, there are many ways to interact with the user, for example, the GUI (graphical user interface) is a very good way to interact with the user, but

2.1 2.6-2.1-2.6Floor: Maximum integer not greater than the argument 2 2-3-3Ceil: Maximum integer not less than argument 3 3-2-2Round: Rounding to nearest integer 2 3-2-3round (num,num_dight) accurate num to num_dight number of digitsFloor (), ceil ()

Features of the Python language: generic, scripting, open source, cross-platform, multi-modelNumber Typeinteger: (with mathematical concepts) no value range limit4 Types of binary representations-Decimal: 1010, 99, 217-Binary, beginning with 0b or 0

Calculates the size of the folder, including subfolders, formatting the output folder size, number of files, and the number of subfolders. The code is as follows Copy Code ?Code can also be used to statistic the number

(1) PHP retains three decimal places and rounded The code is as follows $num = 0.0215489;Echo sprintf ("%.3f", $num); 0.022 (2) PHP keep three decimal digits not rounded The code is as follows

7, Data summaryPart VII is to summarize the data, and Excel uses subtotals and pivot to summarize the data by specific dimensions, and the main functions used in Python are groupby and pivot_table. The following sections describe how to use these

Using the round function to eliminate the calculation error of Excel. In fact, Excel produces this kind of calculation error because we see in the cell the display value is different from the actual value caused by the figure shows the difference

Http://blog.csdn.net/yjp198713/article/details/18131871oracle two minutes, hours of direct time.1, obtain the time difference millisecond number:Select Ceil ((to_date (' 2008-05-02 00:00:00 ', ' yyyy-mm-dd hh24-mi-ss ')-to_date (' 2008-04-30 23:59:59