PowerShell Round & Format Float to max 2 decimals?

问题

I found lots of stuff to format floats to common known numbers, but how can I format a float to a max of 2 decimals, but only if the decimals are needed?

Examples:

  1.11 # not 1.111
  1.12 # it was 1.116 (round up)
  1.1  # not 1.10
  1    # not 1.00

if I do

  $('{0:N2}' -f $flt)

I get

  1.00 # :(

Thanks in advance!

回答1:

Use [math]::round, ie:

[math]::round(1.111,2)

will return 1.11 and

[math]::round(1.00,2)

yields 1

回答2:

You can use the # character in a custom numeric format string to include non-zero digits in a value.

> 1.001,1.101,1.111 | % { '{0:0.##}' -f $_ }
1
1.1
1.11

The N2 standard numeric format string is basically equivalent to 0.00, which produces a fixed number of decimal digits.

来源：https://stackoverflow.com/questions/24037021/powershell-round-format-float-to-max-2-decimals