To convert a number from base 2 (binary) to base 16 (hexadecimal) in Swift, you can use the `String`

initializer that takes a base and convert it to an integer, and then convert that integer to a hex string representation.

Here's an example code that shows how to convert a binary number `101011110`

to hexadecimal:

`main.swift160 chars5 lines`

In this code, we first define a binary string (`"101011110"`

) that we want to convert to hexadecimal.

We then use the `Int`

initializer that takes two parameters: the first parameter is the string that represents the number we want to convert, and the second parameter is the base of that number (`2`

in our case since the number is in binary representation).

The `!`

is used to force unwrap the optional value returned by the `Int`

initializer since we know that the conversion will always succeed.

We then convert the decimal value to a hex string using the `String`

initializer that takes two parameters: the first parameter is the number we want to convert (in decimal), and the second parameter is the base of the output string (`16`

for hexadecimal).

Finally, we print the hexadecimal string (`"AF"`

) to the console.

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