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bocklund/sigfigs.py

Created January 16, 2022 01:45
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Print floating point to n significant digits
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sigfigs.py
import math
def float_sigfigs(val, sigfigs):
"""Return a string representation of a floating point number rounded to some number of significant figures without scientific notation"""
rounded_val = float(f"{val:0.{sigfigs}g}")
num_digits = int(abs(math.log10(rounded_val))) + sigfigs
return f"{rounded_val:0.{num_digits}f}"
print(float_sigfigs(3.141592653589793e-20, 5)) # 0.000000000000000000031416
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