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# Multiple ways to Convert Hexadecimal to/from Number Perl

Learn Perl conversion of Hexa string and numbers with code examples

• Converted Hexa String to number using the `hex` function. For example, hex(“0x1”) returns 1.
• Convert Number to Hexa decimal using the `springf` function with format `%02X`

`Hexadecimal` number is also called a `Hexa` number which contains 16 digits i.e numbers starting from 0,1,2,3,4,5,6,7,8,9,A, B,C,D,E,F. It is based on `Base 16`. i.e `Hexa` number system. So `Hexa Decimal` contains Decimal Numbers,0-9 (base 10) and Extra 6 alphabets - A to F

In Perl, `Hexadecimal` numbers are always either prefixed with `0x` or `0X` or normal numbers. For example, the Hexadecimal number is 0x11A or 0X67B,13A.

Decimal Numbers are numbers that contain numbers based on base 10. i.e numbers starting from 0 to 9, Example decimal Number is 25

The below programs take input from a user keyboard console and store it in the corresponding variable.

## How to Convert Hexa string to Number in Perl

Perl provides a `hex` function that converts `hexa decimal` number into a `number` variable created with hexa string value. Hexa literal values starts with 0x. passed this value into hex function, returns the number.

Here is an hexa string to number

``````my \$hexa = "x0f1";
my \$number = hex(\$hexa);
print "\$number\n";
``````
``````2545
``````

## How to convert Number to Hexa String in Perl

The given number is converted to base 16 Hexa number using the sprintf function.

Sprintf function format value is `%02x`, that replaced and converted to give value.

Here is an example

``````my \$number = 2545;
my \$hexa=sprintf("%02X", \$number);
print "\$hexa\n";
``````

Output:

``````9F1
``````
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