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if no right precision is included, the default will dictated by the current local in use.
a period followed by the number of digits (p) after the decimal character. if the value of p is 0 (zero), the decimal character and the digits to its right will be omitted. if no right precision is included, the default will dictated by the current local in use. the amount being formatted is rounded to the specified number of digits prior to formatting.
an optional precision specifier that says how many decimal digits should be displayed for floating-point numbers.
an optional padding specifier that says what character will be used for padding the results to the right string size. this may be a space character or a 0 (zero character). the default is to pad with spaces. an alternate padding character can be specified by prefixing it with a single quote ('). see the examples below.