Number formatting

by jmcjc5u

JavaScript

var pi = Math.PI;             //  pi = 3.1415926535...               

var exp = pi.toExponential (3);  
// scientific notation with 3 decimal digits: 3.142e+0   

var fixed = pi.toFixed (3);  
// 3 digits after decimal point: 3.142

var p = pi.toPrecision (3); 
// 3 significant digits: 3.14

var pr = Math.round (3.6)   // nearest integer: 4

var pf = Math.floor (3.6)   // floor function: 3