fmt.Println(0.1 + 0.2) // 0.3
fmt.Println(float64(0.1) + float64(0.2)) // 0.30000000000000004
what is the difference between these two floating-point calculations?
fmt.Println(0.1 + 0.2) // 0.3
fmt.Println(float64(0.1) + float64(0.2)) // 0.30000000000000004
what is the difference between these two floating-point calculations?
accuracy is different, one is 32-bit, the other is 64-bit, floating-point number is approximately expressed in the computer, so the deviation is normal, it may be 32-bit error, it is possible 64-bit error, depending on which number you use. In fact, your example has nothing to do with go, and all languages will get similar results.
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