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Data File Handling — Computer Science STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceComputer ScienceData File Handling3 Marks
Question
Write a function to read the content from the "quotes.txt" and transfer the content to the file "Duplicate.txt" but while transfer all the upper case character to lower case character, lower case character to uppercase character and rest of the character as it is.
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