float floor ( float value) rounding by rounding
Returns the next integer not greater than value, and rounds the decimal part of value. The type returned by floor() is still float because the range of float values is usually larger than that of integer.
Copy code The code is as follows:
echo floor(4.3); // 4
echo floor(9.999); // 9
float ceil ( float value) Rounding to the nearest integer
Returns the next integer that is not less than value. If value has a decimal part, it is rounded up by one digit. The type returned by ceil() is still float because the range of float values is usually larger than that of integer.
Copy code The code is as follows:
echo ceil(4.3); // 5
echo ceil(9.999); // 10
float round ( float val [, int precision]) Round floating point numbers
Returns val rounded to the specified precision (the number of decimal digits after the decimal point). precision can also be negative or zero (default).
Copy code The code is as follows:
echo round(3.4); // 3
echo round(3.5); // 4
echo round(3.6); // 4
echo round(3.6, 0); // 4
echo round(1.95583, 2); // 1.96
echo round(1241757, -3); // 1242000
echo round(5.045, 2); // 5.04
echo round(5.055, 2); // 5.06
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