Go Brain Teasers/

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Puzzle 7 Explanation: NaN

Puzzle 7 Explanation: NaN

Understand how float numbers can be different from calculated numbers.

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Try it yourself

Try executing the code below to see the result for yourself.

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Go (1.16.5)
package main
import (
	"fmt"
)
func main() {
	n := 1.1
	fmt.Println(n * n)
}

Explanation

You might have expected 1.21, which is the right mathematical answer.

When seeing this or similar output, some new developers come to the message boards and say, “We found a bug in Go!” The usual answer is, “Read the manual” ...