How to convert string to double in typescript - SharePoint & Microsoft Power Platform Tutorials

In this typescript tutorial, we will see how to convert string to double in typescript, using different methods.

Below are the 3 methods to convert string to double in typescript:

For example, if the string is “21.44”, we will convert it to double then it returns 21.44(without quotes).

Note that in typescript integers, floating point numbers and double-precision floating point numbers is coming under the number data type.

Table of Contents

Convert string to double using number() constructor

Here we will see how we can convert the string to double in typescript using the number() constructor.

The number () constructor in typescript is used to convert the string to a number

For example, the string “22,44444” is passed to the number constructor, then it converts it to a parse floating point number.

In the code editor, create a file i.e. stringToDouble.ts, and then write the below code.

let strVal:string = "22.44444";
let numVal:number = Number(strVal);
console.log(numVal); // Output: 22.44444

To compile the below code, run the below command and you can see the result in the console:

ts-node stringToDouble.ts

This is an example of converting the string to double in typescript using the number() constructor.

Here we will see how we can convert the string to double in typescript using the parseFloat method.

The parseFloat() in typescript is used to parse the string and return the parse floating point number.

For example, we will take a string like below and by using parseFloat(), convert it into parse floating point number or double

In the ‘stringToDouble.ts’ file write the below code:

let strVal:string = "22.44444";
let numVal :number = parseFloat(strVal);
console.log(numVal); // Output:22.44444

To compile the below code, run the below command and you can see the result in the console:

ts-node stringToDouble.ts

This is an example of converting the string to double in typescript using the parseFloat method.

Here we will see how we can convert the string to double in typescript using the + operator.

The + operator in typescript is convert the string into a number. when we apply +operator to a string, it converted the string to a number.

For example when we add + operator to the ‘22.44444’, then it converted to 22.44444.

In the ‘stringToDouble.ts’ file write the below code:

let strVal:string = "22.44444";
let numVal:number = +strVal;
console.log(numVal); // Output: 22.44444

To compile the code run the below command and you can see the result in the console.

ts-node stringToDouble.ts

This is an example of converting the string to double in typescript using the + operator.

In this typescript tutorial, we saw how to convert the string to double in typescript using different methods. These are: