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ii:labs:s2:01:tasks:01 [2023/03/18 17:52] florin.stancu created |
ii:labs:s2:01:tasks:01 [2024/03/15 13:30] (current) florin.stancu [01. [20p] String manipulation] |
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| - | ==== 01. String manipulation ==== | + | ==== 01. [25p] String manipulation ==== |
| First, let's familiarize ourselves with Python's string type: | First, let's familiarize ourselves with Python's string type: | ||
| - | * Read a string input from the user's console (hint: [[https://docs.python.org/3/library/functions.html#input|''input()'']]); next sub-tasks will use this value and apply various string transformations on it; | + | * Read a string input from the user's console (hint: ''[[https://docs.python.org/3/library/functions.html#input|input()]]''); next sub-tasks will use this value and apply various string transformations on it; |
| * Print the reversed string (e.g., "hello world" => "dlrow olleh"); hint: there are at least 3 built-in ways to do this in a single line of code ;) | * Print the reversed string (e.g., "hello world" => "dlrow olleh"); hint: there are at least 3 built-in ways to do this in a single line of code ;) | ||
| - | * Print the same string in "aLtErNaTe CaSe" (if you're out of ideas, simply use the [[https://docs.python.org/3/tutorial/controlflow.html#for-statements|''for'' loop]]); | + | * Print the same string in "aLtErNaTe CaSe" (if you're out of ideas, simply use the [[https://docs.python.org/3/tutorial/controlflow.html#for-statements|for loop]]); |
| - | * Finally: encrypt the given message using [[|Caesar's Cipher]] (aka, replace each of its alphabet letters with the ones ''n'' positions to the: right for encryption, left for decryption); use the number ''17''' for testing! | + | * Finally: encrypt the given message using [[https://en.wikipedia.org/wiki/Caesar_cipher|Caesar's Cipher]] (aka, shift each of its alphabet letters to ''n'' positions to the: right for encryption, left for decryption); use the number ''17''' for testing! |
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| + | <note> | ||
| + | **Hints for the last subtask:** | ||
| + | * Remember the [[https://www.cs.cmu.edu/~pattis/15-1XX/common/handouts/ascii.html|ASCII Table]]? | ||
| + | * You can use the ''[[https://docs.python.org/3/library/functions.html#ord|ord()]]'' built-in function to get the ASCII code of a character (as ''int''); | ||
| + | * For the reverse process (''int'' to ''str'' character) you have ''[[https://docs.python.org/3/library/functions.html#chr|chr()]]''; | ||
| + | * Don't forget to wrap around when you reach the last letter of the alphabet: ''Z + 1 => A''! | ||
| + | |||
| + | </note> | ||
