How to translate the value of %a given by printf?

StackOverflow https://stackoverflow.com/questions/15175573

Question

What is the value of 0x1.921fb82c2bd7fp+1 in a human readable presentation? I got this value by printf using %a.

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Solution

The mantissa is hexadecimal and the exponent is a decimal value representing the power of 2 the mantissa is scaled by.

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