Width¶ width is a decimal integer defining the minimum field width. Preceding the width field by a zero (‘0’) character enables sign-aware zero-padding for numeric types. Formatting output using the format method : The format() method was added in Python(2.6). Most built-in types support a common formatting mini-language, which is described in the next section. You can invoke format function in one of the following ways: Single argument formatting. Below is the syntax to use it. You have to read further to convert the float to 2 decimal places in Python. If the width field is preceded by a zero ('0') character, this enables zero-padding. Finally, the last character “f” of our placeholder stands for “float”. the number following the “.” in our placeholder. '>' The field will be right-aligned within the available space. However, you can convert float to 3 decimal places also. If not specified, then the field width will be determined by the content. Python format function. The format_spec field contains a specification of how the value should be presented, including such details as field width, alignment, padding, decimal precision and so on. The f denotes fixed-point notation. This is equivalent to a fill character of ‘0’ with an alignment type of ‘=’. This is usually the default for strings. The string on which this method is called can contain literal text or replacement fields delimited by braces {}. 'width' is a decimal integer defining the minimum field width. In this tutorial, you will learn how to convert a number into a floating-point number having a specific number of decimal points in Python programming language . Python string format Width and Precision ... print '%10f' % 3.1415926 # Field width 10 print '%10.2f' % 3.1415926 # Field width 10, ... floatValue = 123456.789 print "Five digits after decimal in float %.5f" % floatValue The code above generates the following result. '0' If the width field is preceded by a zero ('0') character, sign-aware zero-padding for numeric types will be enabled. The 10 is the total width of the field being printed, lefted-padded by spaces. The empty string before the colon means “take the next provided argument to format()” – in this case the x as the only argument. The simplest case while calling the Python format function is to have a single formatter. Round Float to Three Decimal Places Using format() of Python. For example, if you want the decimal points to be aligned with width of 12 characters and 4 digits on the right of the decimal, you can use the following: >>> x = 12.35874 >>> print "{:12.4f}".format(x) 12.3587 Our float number 05.333 has to be formatted with 5 characters. You can use string formatting to format floating point numbers to a fixed width in Python. This is equivalent to an alignment type of '=' and a fill character of '0'. ... '.format('Python Tutorial', 10) 'Python Tut' >>> Combining truncating and padding. This is the default for numbers. If not specified, then the field width will be determined by the content. The decimal part of the number or the precision is set to 2, i.e. The float() function allows the user to convert a given value into a floating-point number. The 10.4f part after the colon is the format specification. You can use string formatting to format floating point numbers to a fixed width in Python.For example, if you want the decimal points to be aligned with width of 12 characters and 2 digits on the right of the decimal, you can use the following: >>>x = 12.35874 >>>print "{:12.2f}".format(x) 12.36 Each value type can define its own “formatting mini-language” or interpretation of the format_spec.. Each replacement field contains either the numeric index of a positional argument or the name of a keyword argument. The field will be left-aligned within the available space. 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