Friday, September 21, 2012

How to specify the number of decimal places in PowerShell Output

PowerShell does not have any number formatting built into it. For this reason, we have to use a little bit of .NET to make some changes. Let’s say you have the number 45.54321 and you only want to display the first 2 decimal places. Here is the code.

\$Num = 45.54321

"{0:N2}" -f \$Num

45.54

The first zero is an index number (You will see how this works in a minute.) The N tells us what type of data we are formatting. I Borrowed the below chart from this Microsoft article.

 Name Specifier Description Currency C The value is displayed as currency, using the precision specifier to indicate the number of decimal places to be displayed. Decimal D The value is displayed using the number of digits in the precision specifier; if needed, leading zeroes are added to the beginning of the number. Percentage P The value is multiplied by 100 and displayed as a percentage. The precision specifier indicates the number of decimal places to be displayed. Hexadecimal X The value is displayed as a hexadecimal number. The precision specifier indicates the number of characters to be displayed, with leading

The number 2 tells us how many decimal places to use.

Let’s go back to that index number. Give this a try.

\$Num = 45.54321, 36.75256, 65.34255

"{0:N2}","{1:N2}","{2:N2}" -f \$Num

45.54 36.75 65.34

We can also format this information as currency.

\$Num = 45.54321, 36.75256, 65.34255

"{0:C2}","{1:C2}","{2:C2}" -f \$Num

\$45.54 \$36.75 \$65.34

Matthew Pokel said...

Here is my problem. I'm trying to sum multiple \$ amounts from into a singular total amount. The issue is the data I’m starting with has no decimal point. First 7 digits are dollars with left pad zero’s last 2 digits are cents. How would I sum these into a singular total with the original formatting?

Below are 6 different amounts using (7,2) format as each number
000000025 000001000 000283711 000025000 037000054 000000017
.25 + 10 + 2837.11 + 250 + 370000.54 + .17

Original Data I have to break apart and sum is listed below.
000000025000001000000283711000025000037000054000000017

My total should look like this:
037309807