Question

How to reverse an integer number in TypeScript

Answer 1

function reverseNumber(num: number) {
    return (
        parseFloat(num
                    .toString()
                    .split('')
                    .reverse()
                    .join('')
        ) * Math.sign(num)
    )
}
 
console.log(reverseNumber(89023))
 
console.log(reverseNumber(8.24))
 
console.log(reverseNumber(-371))
 
console.log(reverseNumber(-5.831))
 
console.log(reverseNumber(94800000))
 
 
 
/*
run:
   
32098 
42.8 
-173 
-138.5 
849 
            
*/

 

70+ SQL courses for beginners and professionals

Answer 2

function reverseNumber(num: number) {
    let str = num.toString();
     
    let arr = str.split('');
    arr.reverse();
    str = arr.join('');
     
    num = parseFloat(str);
 
    return num;
}
 
console.log(reverseNumber(13049))
 
 
 
/*
run:
   
94031 
            
*/

 

70+ SQL courses for beginners and professionals