Counting
Let's consider some other methods that can be applied to strings. One of them can help us count the number of appearances of some symbol/substring within a string.
To count the number of symbol/substring in string use .count(symbol/substring) method. For example,
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string = "String Manipulation in Python"
print("letter i appeared", string.count('i'), "times in the string.")
print("letter t appeared", string.count('t'), "times in the string.")
123string = "String Manipulation in Python" print("letter i appeared", string.count('i'), "times in the string.") print("letter t appeared", string.count('t'), "times in the string.")
Note
This method is case-sensitive to symbols. For the example above,
string.count('m')will return 0, whilestring.count('M')will return 1.
Tehtävä
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You are given string "Introduction to Python". You need to calculate the number of symbols 'o' and 't' in this string.
Ratkaisu
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# Variable
string = "Introduction to Python"
# Calculate number of letter 'o'
print(string.count('o'))
# Calculate number of letter 't'
print(string.count('t'))
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Kiitos palautteestasi!
Osio 2. Luku 1
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# Variable
string = "Introduction to Python"
# Calculate number of letter 'o'
print(string.___(___))
# Calculate number of letter 't'
print(___)
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