Extracting Floating-Point Number to N Digits | 點燈坊

As for extracting Floating-point Number to finite digit, we can use parseInt or toFixed.

Version

ECMAScript 2015

parseInt

let x = 2.432;
let y = 2.438;

parseInt (x * 100) / 100 // ?
parseInt (y * 100) / 100 // ?

Extract floating-point number to 2 digits without rounding :

• multiply 100 and pass to parseInt
• divide 100

toFixed

let x = 2.432;
let y = 2.438;
+x.toFixed (2) // ?
+y.toFixed (2) // ?

Extract floating-point number to 2 digits with rounding :

• Use toFixed (2) to extract 2 digit
• Use + to convert to Number

Conclusion

• These are most often use cases for Floating-point Number