Question

How to reverse an integer number in Node.js

Answer 1

function reverseNumber(num) {
	let str = num.toString();
	
	let arr = str.split('');
	arr.reverse();
	str = arr.join('');
	
	num = parseFloat(str);

  return num;
}

console.log(reverseNumber(123045))



/*
run:
  
540321
           
*/

 

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Answer 2

function reverseNumber(num) {
    return (
        parseFloat(num
                    .toString()
                    .split('')
                    .reverse()
                    .join('')
        ) * Math.sign(num)
    )
}
 
console.log(reverseNumber(120345))
 
console.log(reverseNumber(1.85))
 
console.log(reverseNumber(-215))
 
console.log(reverseNumber(-4.1307))
 
console.log(reverseNumber(8700000))
  
 
 
 
/*
run:
   
543021
58.1
-512
-7031.4
78
            
*/

 

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