Question

How to round a number up or down to the nearest 10 in TypeScript

Answer 1

function roundDownToNearest10(num : number) : number {
    return Math.round(num / 10) * 10;
}

console.log(roundDownToNearest10(22)); 
console.log(roundDownToNearest10(79)); 
console.log(roundDownToNearest10(71)); 
console.log(roundDownToNearest10(39.99));
console.log(roundDownToNearest10(55.17)); 
console.log(roundDownToNearest10(3)); 
console.log(roundDownToNearest10(18)); 
console.log(roundDownToNearest10(-14));
console.log(roundDownToNearest10(-101)); 
console.log(roundDownToNearest10(-109));

  
  
  
/*
  
run:
  
20 
80 
70 
40 
60 
0 
20 
-10 
-100 
-110  
  
*/

 

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