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micropython/tests/float/float_format_ints_power10.py

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# Test that integers format to exact values.
# This test requires at least 32-bit floats (won't work with 30-bit).
# Check that powers of 10 (that fit in float32) format correctly.
for i in range(31):
# It works to 12 digits on all platforms *except* qemu-arm, where
# 10^11 comes out as 10000000820 or something.
print(i, "{:.7g}".format(float("1e" + str(i))))