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PHP to take the decimal place function has sprintf,ceil,floor,round and so on functions to achieve rounding, let's look at the specific example.
This article will use PHP to round up numbers to preserve n decimal places, and a small summary of how
The integer function is often used. let's make a summary today! Actually, it's quite simple, just a few functions ~~ Major methods: ceil, floor, round, intval integer methods such as rounding, rounding, and ignoring decimals
There are four common
Example of PHP rounding, rounding, and using the round function. Example of using the PHP rounding, rounding, and round functions, and rounding the round decimal places: PHP keeps two decimal places and rounds them to copy the code as follows: $ n0.1
PHP rounding, rounding, round function Use example, rounding round
Decimal Example:
PHP reserved two decimal places and rounded
Copy the Code code as follows:$n = 0.1265489;Echo sprintf ("%.2f", $n); 0.13
As you can see, we used the sprintf
The conversion between decimal and binary
(1) Decimal conversion to binary, divided into integers and decimal parts
① integral number of parts
Method: In addition to 2, in reverse order, that is, each part of the integer divided by 2, the
One, the conversion between decimal and binary (1) Decimal conversion to binary, divided into integers and fractional parts ① whole number of parts Methods: In addition to the 2 method, that is, each time the integer part divided by 2, the remainder
I. Introduction of BigDecimalJava.math.BigDecimalImmutable immutable, arbitrary-precision, signed decimal number. The BigDecimal consists of an integer non-scaling value of arbitrary precision and a 32-bit integer scale (scales).Scaling (scale) if
One, the conversion between decimal and binary(1) Decimal conversion to binary, divided into integers and fractional parts① whole number of partsMethods: In addition to the 2 method, that is, each time the integer part divided by 2, the remainder is
Decimal Example: PHP reserved two decimal places and rounded $n =0.1265489;echo sprintf ("%.2f", $n); 0.13 As you can see, we used the sprintf function to format the $n%.2f is the target format, where 2 means that two-bit f means float
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