Question

How to get the number of digits after the decimal point in Node.js

Answer 1

function totalDigitsAfterDecimalPoint(num) {
    if (Number.isInteger(num)) {
       return 0;
  	}

  	return num.toString().split('.')[1].length;
}

 
console.log(totalDigitsAfterDecimalPoint(3.14)); 
console.log(totalDigitsAfterDecimalPoint(90.0)); 
console.log(totalDigitsAfterDecimalPoint(-3.998)); 
console.log(totalDigitsAfterDecimalPoint(871.5)); 
console.log(totalDigitsAfterDecimalPoint(98731));   
   
   
   
   
/*
run:
   
2
0
3
1
0
   
*/

 

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