How do you check if a string contains only digits in Swift
Swift
🤖 Code Explanation
/*
The checkString() function defines a CharacterSet called digits which contains all the decimal digits (0-9). It also defines a CharacterSet called stringSet which contains all the characters in the string passed into the function.
The function returns true if the digits CharacterSet is a superset of the stringSet CharacterSet, meaning that every character in stringSet is also in digits. Otherwise, it returns false.
The main body of the code calls the checkString() function, passing in the inputString as an argument. If the function returns true, it prints "The string contains only digits." Otherwise, it prints "The string does not contain only digits."
*/
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