Swift Programming Exercises, Practice, Solution: String

Swift String Programming [21 exercises with solution]

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1. Write a Swift program to draw a HTML string as bold or italic text.
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2. Write a Swift program to insert a given string to another given string where the second string will be in the middle of the first string.
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3. Write a Swift program to create a string made of two copies of the last two characters of a given string. The given string length must be at least 2.
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4. Write a Swift program to create a new string made of a copy of the first two characters of a given string. If the given string is shorter than length 2, return whatever there is.
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5. Write a Swift program to return the first half of a given string of even length.
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6. Write a Swift program to create a new string without the first and last character of a given string. The string length must be at least 2.
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7. Write a Swift program that accept two strings of different length and return a string of the form short+long+short. Two given string's length may be 0.
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8. Write a Swift program that accept two strings and return their concatenation, except the first char of each string. The given strings length must be at least 1.
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9. Write a Swift program to move the first two characters of a given string to the end. The given string length must be at least 2.
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10. Write a Swift program to move the last two characters of a given string to the start. The given string length must be at least 2.
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11. Write a Swift program to create a new string without the first and last character of a given string. The string may be any length, including 0.
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12. Write a Swift program to create a new string taking the middle two characters of a given string of even length. The given string length must be at least 2.
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13. Write a Swift program to test if a given string starts with "ab".
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14. Write a Swift program to create a new string made of the first and last n chars from a given string. The string length will be at least n.
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15. Write a Swift program to create a new string of length three from a given string of odd length from its middle. The string length must be three.
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16. Write a Swift program to concate two given strings and return the new string. If the new string creates a double character then omit one of the character. so "vwx" and "xyz" will return "vwxyz".
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17. Write a Swift program to create a new string of any length from a given string where the last two characters are swapped, so "abcde" will be "abced".
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18. Write a Swift program to return "abc" or "xyz" if a given string begins with "abc" or "xyz" otherwise return the empty string.
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19. Write a Swift program to check if the first two characters are same of the last two characters of a given string.
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20. Write a Swift program to create a new string made of 2 copies of the first 2 characters of a given string. The string may be any length.
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21. Write a Swift program to check if the first or last characters are 'a' of a given string, return the given string without those 'a' characters, and otherwise return the given string.
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