convert a number from base 10 to base 8 in swift

To convert a number from base 10 to base 8 in Swift, you can use the built-in String initializer that takes in a radix as a parameter. Here is the algorithm:

1. Get the decimal number as input.
2. Convert the decimal number to a string representation in base 8 using the String initializer with a radix of 8.
3. Return the string representation of the number in base 8.

Here is the code in Swift:

main.swift
func convertToBase8(decimal: Int) -> String {
    return String(decimal, radix: 8)
}
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You can call this function with a decimal input and it will return the corresponding string representation of the number in base 8.

Example usage:

main.swift
let decimalNumber = 23
let base8Number = convertToBase8(decimal: decimalNumber)
print(base8Number) // Output: "27"
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In this example, the decimal number 23 is converted to its base 8 representation, which is the string "27". The function returns this string as the output.