js looping numbers accumulate decimals

   let a = 0
    for (let i = 0; i < 30; i++) {
    
    
      a += 0.6
      console.log(a)
    }

• print result
  
• Check it out and find that this is a bug in javascript floating point arithmetic.
• The number of solutions * 1000 and finally divided by 1000
• To solve the problem of js accumulating all the time, there will be a decimal bug. Multiply all numbers by 1000: num*1000; then accumulate to get sum, and then divide by 1000: sum=sum/1000;