'xxx{: }yyyformat( 'xxx yyy'xxx{: }yyy 'xxx yyy {: ff -substitute float - places in total - places after the point floating point numbers are slightly more complicated the width parameter has two partsseparated by decimal point the first number is the width of the entire number (just as it is for strings and integersthe number after the decimal point is the number of decimal points of precision that should be included in the formatted output