11. String Variable

• Store strings as names and general text

• We call strings a sequence of symbols such as letters, numbers, punctuation marks, etc.

• To differentiate its commands from a string, we use quotation marks at the beginning and end

1 text = "Joaquin and Maria eat bread" 2 print(text) Edit this code line that just executed next line to execute << First < Prev Next > Last >> Step 1 of 2 Submit Python Tutor by Philip Guo Customize visualization (NEW!)

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Activity: CodeLens 11.1 (cl_l05_11a_en)

• Note that there is no problem using spaces to separate words

• A string has an associated length

• We can obtain the size through the len function built into Python

1 text = "Joaquin and Maria eat bread" 2 print(len(text)) Edit this code line that just executed next line to execute << First < Prev Next > Last >> Step 1 of 2 Submit Python Tutor by Philip Guo Customize visualization (NEW!)

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Activity: CodeLens 11.2 (cl_l05_11b_en)

• We can access the characters in the string using an integer to represent their position in the string

• This number is called an index and we start counting from zero

• We access the character providing the index between brackets []

1 text = "Joaquin and Maria eat bread" 2 print(text[0]) 3 print(text[2]) 4 print(text[5]) 5 print(text[10]) 6 print(text[15]) 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 11.3 (cl_l05_11c_en)

• Caution: we cannot access an index greater than the amount of characters in the string

1 text = "Juan and Maria eat bread" 2 print(text[22]) Edit this code line that just executed next line to execute << First < Prev Next > Last >> Step 1 of 2 Submit Python Tutor by Philip Guo Customize visualization (NEW!)

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Activity: CodeLens 11.4 (cl_l05_11d_en)

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