go - What does "%b" do in fmt.Printf for float64 and what is Min subnormal positive double in float64 in binary format?

Question

Go doc for Package fmt Floating-point and complex constituents says:

Floating-point and complex constituents:
%b decimalless scientific notation with exponent a power of two, in the manner of strconv.FormatFloat with the 'b' format, e.g. -123456p-78

Code:

fmt.Printf("0b%b
", 255) // 0b11111111
fmt.Printf("%b
", 1.0)   // 4503599627370496p-52 

What is 4503599627370496p-52?

Answer 1

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