Convert Date

Simple

This function should take a date string in the format dd/mm/yyyy and convert it to the format yyyy-mm-dd. If the input is not in the correct format, the function should return an error message "Error: Invalid date.".

example

Input: String (str).

Output: String (str).

Examples:

assert convert_date("25/12/2021") == "2021-12-25"
assert...

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date
string

by:

freeman_lex

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