buoi 2 - bai 1
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| Language | Python |
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| Owner | cuongd10vt3 |
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| Modified | |
| Visibility | Public |
s = "this is a string"
s1 = s.upper().lower()
result1 = s1 is s
result2 = (s1 == s)
print(result1)
print(result2)
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