# An error occurred while calculating garbled characters

Source: Internet
Author: User
One method left to solve the garbled problem. If there are four zeros, garbled characters may occur. For example, 0.01*0.00770000e-5 (garbled) should be equal to 0.00007. I don't know why php has such an error. Note: The original decimal point must be retained. Do not give away. How can this problem be solved? ------ Solution -------------------- 1. this is not garbled, it is scientific notation. 2. the round () function can specify the number of digits to the decimal point \$ x.
If there are four zeros, garbled characters may occur.
For example, 0.01*0.007 = 7.0E-5 (garbled)
It should be 0.00007.

I don't know why php has such an error.

Note: The original decimal point must be retained. Do not give away. How can this problem be solved?

------ Solution --------------------
1. this is not garbled. it is a scientific notation.
2. the round () function can specify the digits of the decimal point.
\$ X = 0.0000722;
\$ S = round (\$ x, 5 );
Echo \$ s;
------ Solution --------------------
1. sprintf:
PHP code
```  ------ Solution --------------------

PHP code

Echo bcmul (0.01, 0.007, 5); // 0.00007------ Solution --------------------Learned------ Solution --------------------Okay, it's disgusting.\$ S = 0.01*0.007;Echo number_format (\$ s, 5 ,'.','');------ Solution --------------------

Discussion

\$ S = number_format (\$ x, 6 ,'.','');
The result is 0.000070.

How to remove the following 0 to 0.00007

------ Solution --------------------

Discussion
If there are four zeros, garbled characters may occur.
For example, 0.01*0.007 = 7.0E-5 (garbled)
It should be 0.00007.

I don't know why php has such an error.

Note: The original decimal point must be retained. Do not give away. How can this problem be solved?

------ Solution --------------------Well. You can do this without adding 0:

PHP code

```
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