I was trying to do some simple mathematical calculations in HTML and jQuery and JavaScript, so I wanted to get input from user.

For input I tried doing this :

```
var x = prompt("Enter a Value","0");
var y = prompt("Enter a Value", "0");
```

But I am not able to perform any kind of calculations as these values are strings.

Please, can any one show me how to convert them into integers.

**parseInt()** or **parseFloat()** are functions in JavaScript which can help you convert the values into integers or floats respectively.

```
parseInt(string, radix);
parseFloat(string);
```

**string**: the string expression to be parsed as a number.**radix**: (optional, but highly encouraged) the base of the numeral system to be used - a number between 2 and 36.

```
var x = prompt("Enter a Value", "0");
var y = prompt("Enter a Value", "0");
var num1 = parseInt(x);
var num2 = parseInt(y);
```

After this you can perform which ever calculations you want on them.

JavaScript will "convert" numeric string to integer, if you perform calculations on it (as JS is weakly typed). But you can convert it yourself using `parseInt`

or `parseFloat`

.

Just remember to put radix in `parseInt`

!

In case of integer inputs:

```
var x = parseInt(prompt("Enter a Value", "0"), 10);
var y = parseInt(prompt("Enter a Value", "0"), 10);
```

In case of float:

```
var x = parseFloat(prompt("Enter a Value", "0"));
var y = parseFloat(prompt("Enter a Value", "0"));
```

```
var xInt = parseInt(x)
```

This will return either the `integer`

value, or `NaN`

.

Read more about parseInt here.

You have to use parseInt() to convert

For eg.

```
var z = parseInt(x) + parseInt(y);
```

use parseFloat() if you want to handle float value.

You can use `parseInt()`

but, as mentioned, the radix (base) should be specified:

```
x = parseInt(x, 10);
y = parseInt(y, 10);
```

10 means a base-10 number.

See this link for an explanation of why the radix is necessary.

**Working Demo** **Reading more Info**

`parseInt(x)`

it will cast it into integer

```
x = parseInt(x);
x = parseInt(x,10); //the radix is 10 (decimal)
```

`parseFloat(x)`

it will cast it into float

**Working Demo** **Reading more Info**

```
x = parseFloat(x);
```

you can directly use `prompt`

```
var x = parseInt(prompt("Enter a Number", "1"), 10)
```

©2020 All rights reserved.