# JavaScript: Currency math (add, subtract, multiply, division etc.)

## JavaScript Math: Exercise-25 with Solution

Write a JavaScript function to do currency math (add, subtract, multiply, divide etc.).

Test Data :
n1 = '\$40.24', n2 = '\$21.57';

Sample Solution:

JavaScript Code:

``````// Declare variables 'n1' and 'n2' and assign them string values representing dollar amounts.
var n1 = '\$40.24';
var n2 = '\$21.57';
// Define a regular expression pattern to match non-numeric characters.
var regp = /[^0-9.-]+/g;

// Remove non-numeric characters from 'n1' and 'n2', convert the resulting strings to floating-point numbers, and perform addition. Output the result to the console.
console.log(parseFloat(n1.replace(regp, '')) + parseFloat(n2.replace(regp, '')));

// Remove non-numeric characters from 'n1' and 'n2', convert the resulting strings to floating-point numbers, and perform subtraction. Output the result to the console.
console.log(parseFloat(n1.replace(regp, '')) - parseFloat(n2.replace(regp, '')));

// Remove non-numeric characters from 'n1' and 'n2', convert the resulting strings to floating-point numbers, and perform multiplication. Output the result to the console.
console.log(parseFloat(n1.replace(regp, '')) * parseFloat(n2.replace(regp, '')));

// Remove non-numeric characters from 'n1' and 'n2', convert the resulting strings to floating-point numbers, and perform division. Output the result to the console.
console.log(parseFloat(n1.replace(regp, '')) / parseFloat(n2.replace(regp, '')));
```
```

Output:

```61.81
18.67
867.9768
1.865554010199351
```

Visual Presentation:

Flowchart:

Live Demo:

See the Pen javascript-math-exercise-25 by w3resource (@w3resource) on CodePen.

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