2. Slicing

• Slice from the first index to the one before the second

1 x = "0123456789" 2 print(x[0:2]) 3 print(x[1:2]) 4 print(x[2:4]) 5 print(x[0:5]) 6 print(x[1:8]) Edit this code line that just executed next line to execute << First < Prev Next > Last >> Step 1 of 6 Submit Python Tutor by Philip Guo Customize visualization (NEW!)

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Activity: CodeLens 2.1 (cl_l18_2a_en)

• We can omit indices by substituting the corresponding end and we can also have negative indices: -1 is the last one, -2 the penultimate

1 x = "0123456789" 2 print(x[:2]) 3 print(x[4:]) 4 print(x[4:-1]) 5 print(x[-4:-1]) 6 print(x[:]) Edit this code line that just executed next line to execute << First < Prev Next > Last >> Step 1 of 6 Submit Python Tutor by Philip Guo Customize visualization (NEW!)

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Activity: CodeLens 2.2 (cl_l18_2b_en)

2.1. Slice increment

• I can use an increment when slicing the string

1 texto = "papa cuando nace" 2 print(texto[::2]) 3 print(texto[::-1]) Edit this code line that just executed next line to execute << First < Prev Next > Last >> Step 1 of 3 Submit Python Tutor by Philip Guo Customize visualization (NEW!)

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Activity: CodeLens 2.1.1 (cl_l18_2c_en)

• Check if a word is a palindrome

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1

word = input("Word: ")

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if word == word[::-1]:

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    print("%s is a palindrome" % word)

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else:

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    print("%s is not a palindrome" % word)

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Activity: 2.1.2 ActiveCode (ac_l18_2_en)

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