I have a string that I try to convert to a decimal number with 16 decimals. Then I like to add that number to the number 0 which should be:
30280.9529335
But I get: 030280.9529335
How do you properly do this in javascript?
var totalnumber = 0; var str = "30280.9529335";
totalnumber = totalnumber + ConvertToDouble(str);
console.log(totalnumber); //030280.9529335
function ConvertToDouble(x) {
return Number.parseFloat(x).toFixed(16);
}Well your problem is placement of toFixed, toFixed return String not number
console.log(typeof (1).toFixed(2))So here your ConvertToDouble function returns string and 0 + some numeric string will act as concatenation not addition
var totalnumber = 0; var str = "30280.9529335";
totalnumber = totalnumber + ConvertToDouble(str);
console.log(totalnumber.toFixed(16)); //030280.9529335
function ConvertToDouble(x) {
return Number.parseFloat(x)
}
You can use Number.parseFloat and Number.parseInt similar to how you were. You used toFixed incorrectly.
The toFixed() method converts a number into a string, keeping a specified number of decimals. If the desired number of decimals are higher than the actual number, nulls are added to create the desired decimal length.
Example:
let a = "30280.9529335";
console.log(parseFloat(a))
// 30280.9529335
let totalnumber = 0;
let str = "30280.9529335";
function convert(a, b) {
try {
return (Number.parseInt(a) + Number.parseFloat(b)).toFixed(16)
} catch(error) {
return error;
}
}
function convertb(a, b) {
try {
return Number.parseInt(a) + Number.parseFloat(b)
} catch(error) {
return error;
}
}
console.log(convert(totalnumber, str))
console.log(convertb(totalnumber, str))You can also use bigInts https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt
const theBiggestInt = 9007199254740991n;
const alsoHuge = BigInt(9007199254740991);
// ↪ 9007199254740991n
const hugeString = BigInt("9007199254740991");
// ↪ 9007199254740991n
const hugeHex = BigInt("0x1fffffffffffff");
// ↪ 9007199254740991n
const hugeBin = BigInt("0b11111111111111111111111111111111111111111111111111111");
// ↪ 9007199254740991n