python - Why doesn't "%0.2f" % (.3) return "0.29"? -


The IEEE 754 floating point value for 0.3 is approximately 0.29999999999999998.

Based on this, it looks like when you execute "% 0.2f"% (.3) , then Python should print "0.29" But, it actually prints "0.30"

What does Python do behind the scenes to get string representation?

Edit : This is interesting:

In existing versions, Python displays a value based on the least decimal fraction Returns the correct binary value

Rounding rounds the Python number, And 0.29 9999 is the goal of two decimal digits 0.30.

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