Formatting a float to 2 decimal places

Question

I am currently building a sales module for a clients website  So far I have got the sale price to calculate perfectly but where I have come stuck is formatting the output to 2 decimal places   I am currently calling this in a variable so that I can data bind the results to a listview   Sale   float Parse   x Sale Price -  x Sale Price    x Discount Price   100    ToString        Can anyone show me how to format the output to 2 decimal places   Many Thanks

User · Accepted Answer

You can pass the format in to the ToString method  e g    myFloatVariable ToString  0 00      2dp Number  myFloatVariable ToString  n2       2dp Number  myFloatVariable ToString  c2       2dp currency   Standard Number Format Strings

User · Answer

string outString  number ToString      0 00

User · Answer

I believe   String Format   0 0 00   Sale     Should do it   See Link String Format Examples C

User · Answer

String Format  quot  0           quot   value  A more complex example from String Formatting in C    String Format  quot  0      0 00       0 00  Zero  quot   value   This will output     1 240 00  if passed 1243 50  It will output the same format but in parentheses if the number is negative  and will output the string    Zero    if the number is zero

User · Answer

As already mentioned  you will need to use a formatted result  which is all done through the Write    WriteLine    Format    and ToString   methods   What has not been mentioned is the Fixed-point Format which allows for a specified number of decimal places  It uses an  F  and the number following the  F  is the number of decimal places outputted  as shown in the examples   Console WriteLine   0 F2    12         12 00 - two decimal places Console WriteLine   0 F0    12 3       12 - ommiting fractions

User · Answer

The first thing you need to do is use the decimal type instead of float for the prices  Using float is absolutely unacceptable for that because it cannot accurately represent most decimal fractions   Once you have done that  Decimal Round   can be used to round to 2 places

User · Answer

This is for cases that you want to use interpolated strings  I m actually posting this because I m tired of trial and error and eventually scrolling through tons of docs every time I need to format some scalar      1234 5678 0 00           1234 57         2 decimal places  notice that value is rounded    1234 5678 10 0 00           1234 57      right-aligned    1234 5678 -10 0 00       1234 57         left-aligned    1234 5678 0              1234 5678       5 optional digits after the decimal point    1234 5678 0 00000        1234 56780      5 forced digits AFTER the decimal point  notice the trailing zero    1234 5678 00000 00       01234 57        5 forced digits BEFORE the decimal point  notice the leading zero    1234 5612 0              1235            as integer  notice that value is rounded    1234 5678 F2             1234 57         standard fixed-point    1234 5678 F5             1234 56780      5 digits after the decimal point  notice the trailing zero    1234 5678 g2             1 2e 03         standard general with 2 meaningful digits  notice  e     1234 5678 G2             1 2E 03         standard general with 2 meaningful digits  notice  E     1234 5678 G3             1 23E 03        standard general with 3 meaningful digits    1234 5678 G5             1234 6          standard general with 5 meaningful digits    1234 5678 e2             1 23e 003       standard exponential with 2 digits after the decimal point  notice  e     1234 5678 E3             1 235E 003      standard exponential with 3 digits after the decimal point  notice  E     1234 5678 N2             1 234 57        standard numeric  notice the comma    1234 5678 C2              1 234 57       standard currency  notice the dollar sign    1234 5678 P2             123 456 78      standard percent  notice that value is multiplied by 100    1234 5678 2              2                    Performance Warning  Interpolated strings are slow  In my experience this is the order  fast to slow     value ToString format    blah blah  string Format   0 format  blah blah   value     value format  blah blah

[c#] Formatting a float to 2 decimal places

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