string formatting

[barryjo]

When I run this simple program 0.166666666666 is printed.
What do i do to make the print 0.17
i.e. what is the formatting command to truncate the string to two digits beyond the dec point??

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x = (1/6) s = str(x) print(s)

[bowlofred]

You can use either format, or the formatting in f-strings. The description of it from the documentation is found in the Format specification mini-language.

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>>> x = 1/6 >>> print(x) 0.16666666666666666 >>> print(format(x, ".2f")) 0.17 >>> print(f"{x:.2f}") 0.17

[barryjo]

thanks

[barryjo]

oops, another issue. in the following I want to see 12.34. not 1.23+01
i.e.

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x = 12.345678123456 s = format(x,".2") print(s)

[Larz60+]

1 2	print(f"{x: 2.3f}") 12.346

[snippsat]

Use f-string as shown last bye bowlofred.

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>>> x = 12.345678123456 >>> print(f"The number is {x:.2f} a couple more {x:.4f}") The number is 12.35 a couple more 12.3457

[barryjo]

in the following, is the 3 the digits to the right of the decimal?
what does the 2 mean?

print(f"{x: 2.3f}")


12.346What if my number was 123456.345 and I want to see 123456.3

[snippsat]

123456.345 and I want to see 123456.3

Then is n:.1f

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>>> n = 123456.345 >>> print(f"The number with one decimal place {n:.1f}") The number with one decimal place 123456.3 >>> print(f"The number with ten decimal place {n:.10f}") The number with 10 decimal place 123456.3450000000

f'{value:{width}.{precision}}'
width specifies the number of characters used in total to display.

Some more stuff with f-string

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>>> n = 123456 >>> print(f"The number in binary {n:02b}") The number in binary 11110001001000000 >>> print(f"The number in hex {n:02X}") The number in hex 1E240

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# f-strings can take any Python expressions inside the curly braces >>> grapes = 5.20 >>> apples = 9.70 >>> print(f'The price is {apples + grapes:.2f}$') The price is 14.90$   # Also methods eg .upper() >>> for word in 'f-strings are cool'.split(): ...     print(f'{word.upper():~^20}') ... ~~~~~F-STRINGS~~~~~~ ~~~~~~~~ARE~~~~~~~~~ ~~~~~~~~COOL~~~~~~~~