In a variable is stored this value: $10.00
And I need to get this 10.00
I've tried to convert this value to float:
new_price = '%.2f' % (price.to_f)
but I get just 0.0.
What's wrong with that? I've tried also
price = price.strip
price[0]=""
new_price = '%.2f' % (price.to_f)
But even this didn't help me... where is a problem?
Thanks
You need to remove the $ first. The whole thing like this:
'%.2f' % '$10.00'.delete( "$" ).to_f
or
'%.2f' % '$10.00'[1..-1].to_f
if you like density and may encounter non dollars.
10.0 instead of 10.00.
1.9.3-p392 :006 > '%.2f' % '$10.00'.delete( "$" ).to_f => "10.00"ruby 1.9.3p385.To set it in a variable:
current_price= '%.2f' % '$10.00'.delete( "$" ).to_f
The more common error, is a value in the thousands where there's a comma in the string like: 10,000.00. The comma will cause the same truncation error, but the decimal won't, and many programmers won't even catch it (we don't even notice the comma anymore). To fix that:
current_price= '%.2f' % '10,000.00'.delete( "," ).to_f
Adding on to froderick's answer of:
You need to remove the $ first. The whole thing like this:
'%.2f' % '$10.00'.delete( "$" ).to_f
or
'%.2f' % '$10.00'[1..-1].to_f
if you like density and may encounter non dollars. you need to format the code for output to ensure that you get two decimal places >with
You need to format your output string to ensure you get two decimal places.
puts "Current amount: #{format("%.2f", amount)}"
