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Number.prototype.toFixed() Method in Number Class of Javascript Syntax with Examples
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Usage 
The toFixed() method used to round off number using fixed-point notation.
Syntax 
numberObj.toFixed([digits])
Example
var numObj = 4568.3456;

document.write(numObj.toFixed(1));     
document.write(numObj.toFixed(2));
document.write(numObj.toFixed(3)); 
Output 
4568.3
4568.34
4568.346
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