Python daily exercise 3: reverse a string

Question

• write a program to reverse a given string

str1 = "PYnative"

• Expected output

evitanYP

My attempt

str1 = "PYnative"
reversed_string = str1[::-1]
print(reversed_string)

Recommend solution

str1 = "PYnative"
print("Original String is:", str1)

str1 = ''.join(reversed(str1))
print("Reversed String is:", str1)

My reflection

I only know how to reversed a string using string slicing method, but do not know the reverse() and the join().

Comments

[jmagave]

Looks like using slice is 4x faster. Timed with %timeit command of YPython.

%timeit s[::-1]
81 ns ± 1.05 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)
%timeit "".join(reversed(s))
311 ns ± 2.89 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)

[HHMathewChan]

just find out your comment, good to know how to count program time, thx