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Summary of articles about conversion introduction
- 伊谢尔伦Original
- 2017-06-15 10:20:521492browse
Problem In javascript, both integers and floating-point numbers belong to the Number data type (one of the simple data types). We often find that when printing a floating-point number such as 1.0, the result is 1 instead of 1.0. This is due to saving the floating-point number. Points take up twice as much memory as storing integer values, so ECMAScript wastes no time converting floating point numbers to integers. Although the above situation makes patients with obsessive-compulsive disorder a little uncomfortable, it is not a big mistake anyway. The next situation will be very scary. For example, when we calculate 0.1 plus 0.2, the output result is not 0.3, but 0.3000000000000004. what the fuck? ! For children who encounter this situation for the first time, do you feel that your world view has been challenged? The reason was so I quickly opened the book to save my soul and body, and found that it was clearly written in the book: ECMAScrip is based on IEEE754 numerical floating point calculation. If you don’t know what IEEE754 is, click here. This numerical calculation method will save the value as Binary is then calculated. Since floating point numbers are infinite when expressed in binary, they will be
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