- toString : this method converts a numeric value to a string
let randomNumber = 3124325454352;
console.log(randomNumber);
console.log(randomNumber.toString());
console.log((21414 + 234234).toString());
- if you look at the console, you’ll see that before we converted it to a string, randomNumber was printed as a numeric value, without quotation marks.
- Remember that when numbers are concatenated to strings, they become strings themselves. So, there is no reason to use the .toString method during string to number concatenation.
- This method comes in handy when using functions or methods that require a string parameter and thus the number needs to be converted to a string.
- to Exponential : this method converts a numeric value to a string that contains the exponential notation of the value
- syntax:
.toExponential(n)
let x = 3.2526;
console.log(x);
console.log(x.toExponential(2));
console.log(x.toExponential(4));
- to Fixed : this method converts a numeric value to the same numeric value with the specified number of decimal places included. This is useful when dealing with values such as money or scores.
let payCheck = 3000;
let groceries = 240.247;
let utilityBill = 139.26;
let cellPhone = 45.206;
let savings = 1000;
let spendingMoney = payCheck - groceries - utilityBill - cellPhone - savings;
console.log("This is how much money I have left: $" + spendingMoney);
console.log("But it makes more sense to round money to two decimal places, like this : $" + spendingMoney.toFixed(2));
- to Precision : this method converts a numeric value to a string with a specified length. It is essentially the same as the
.toFixed() method, but the return type is a string. And instead of specifying the number of decimal places, we are specifying the number of characters in total, or the length of the string:
let grade = 87.2267;
console.log("My grade is " + grade.toPrecision(4));
console.log("My grade is " + grade.toPrecision(3));
console.log("My grade is " + grade.toPrecision(2));