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$ irb
irb(main):001:0> 0.1 + 0.2
=> 0.30000000000000004
$ python
Python 2.7.16 (default, Jun 19 2019, 07:40:37)
[GCC 4.2.1 Compatible Apple LLVM 10.0.1 (clang-1001.0.46.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> 0.1 + 0.2
0.30000000000000004
$ cat main.go
package main
import "fmt"
func main() {
var a, b float64 = 0.1, 0.2
fmt.Printf("%.17f\n", a + b)
}
$ go run main.go
0.30000000000000004
$ node
Welcome to Node.js v12.18.2.
Type ".help" for more information.
> 0.1 + 0.2
0.30000000000000004
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