To convert a hexadecimal string to an integer in Elixir, you can use the `String.to_integer/2`

function with the base parameter set to 16. This function will parse the hexadecimal string and return the corresponding integer value.
For example:

1 2 3 |
hex_string = "1A" integer_value = String.to_integer(hex_string, 16) IO.puts(integer_value) |

This will output:

```
1
``` |
```
26
``` |

## What is the behavior of the conversion function when dealing with large hex values in Elixir?

In Elixir, the `String.to_integer/2`

function can be used to convert a hexadecimal string to an integer. When dealing with large hex values, the behavior of the conversion function may depend on the size of the value being converted.

If the hex value is within the range of a 64-bit signed integer (-9223372036854775808 to 9223372036854775807), the conversion function will successfully convert the hex value to an integer.

For example:

1 2 |
iex> String.to_integer("FFFFFFFFFFFFFFFF", 16) 18446744073709551615 |

However, if the hex value exceeds the range of a 64-bit signed integer, an `ArgumentError`

will be raised.

For example:

1 2 |
iex> String.to_integer("10000000000000000", 16) ** (ArgumentError) argument error |

In such cases, it may be necessary to use libraries or custom functions to handle large hex values and perform conversions to integers.

## What is the Elixir function to convert hex to integer?

The `:binary.decode_unsigned/1`

function can be used in Elixir to convert a hexadecimal representation to an integer. This function takes a binary input and returns the equivalent integer value.

For example:

1 2 3 |
binary = <<16#1F>> integer = :binary.decode_unsigned(binary) IO.puts(integer) # Output: 31 |

In this example, the binary value `<<16#1F>>`

is equal to hexadecimal `1F`

, which corresponds to integer `31`

when converted using `:binary.decode_unsigned/1`

function.

## What is the effect of sign extension on hexadecimal to integer conversion in Elixir?

In Elixir, sign extension is not relevant when converting a hexadecimal value to an integer. This is because hexadecimal values do not have a sign associated with them like in two's complement representation.

When converting a hexadecimal value to an integer in Elixir, the value is simply interpreted as an unsigned integer. The result of the conversion will be the same regardless of the original hexadecimal value representing a positive or negative number. Elixir will simply interpret the hexadecimal value and convert it to an integer without considering the sign.

Therefore, the effect of sign extension on hexadecimal to integer conversion in Elixir is that there is no impact at all. The conversion process simply treats the hexadecimal value as an unsigned integer and converts it to the corresponding integer value.

## What is the practical application of hex to integer conversion in Elixir?

One practical application of hex to integer conversion in Elixir is in parsing hexadecimal strings that represent numbers. For example, when working with data encoded in hexadecimal format, such as in cryptography or encoding RGB color values, you may need to convert the hexadecimal string representation into an integer for processing or calculations.

Another application is in handling input from users or external systems that provide data in hexadecimal format. By converting the hexadecimal input to integers, you can validate and process the data more easily within your Elixir application.

Overall, hex to integer conversion in Elixir can be useful for various tasks where you need to work with hexadecimal data and perform calculations or operations that require integer values.

## What is the value of a hex number when converted to integer in Elixir?

In Elixir, you can convert a hexadecimal (hex) number to an integer using the `String.to_integer/1`

function with the base parameter set to 16. For example:

1 2 3 4 |
iex> hexadecimal_number = "1F" iex> integer_value = String.to_integer(hexadecimal_number, 16) iex> IO.inspect(integer_value) 31 |

In this example, the hexadecimal number "1F" is converted to an integer value of 31.