toPrecision Math function to use fixed length of number in JavaScript

SQL PHP HTML ASP JavaScript articles and free scripts to download

toPrecision Math function

WE can use toPrecision math function in JavaScript where we want to convert numbers to fixed length. If required the given number is converted to exponential notation to match the space or length specified. This is a common way to where we want numbers to be of definite length.

Here are some examples to explain toPrecision math function.

var my_val=11.257;
document.write (my_val.toPrecision(2)); // output 11
document.write (" ---- ");

var my_val=11.257;
document.write (my_val.toPrecision(5)); // output 11257
document.write (" ---- ");

var my_val=11.257;
document.write (my_val.toPrecision(6)); // output 112570
document.write (" ---- ");

var my_val=1.1257;
document.write (my_val.toPrecision(3)); // output 1.13
document.write (" ---- ");

var my_val=11257;
document.write (my_val.toPrecision(3)); // output 1.13e+4
document.write (" ---- ");

var my_val=11257;
document.write (my_val.toPrecision(2)); // output 1.13e+4
document.write (" ---- ");