What is the content of the res variable in the following statement : var res = 0.1 * 3;?

The logical value should be 0.3

but once the code is executed, we can see the value 0.30000000000000004

The source of this issue is due to the value (0.1) being an irrational number.

To fix this and get the expected value, one way is to do this:

var res=(0.1*3).toFixed(1);

Output:  "0.3"