Converting Between Data Types
1234567891011121314# Converting strings to integers and floats string_number = "42" int_number = int(string_number) # Converts to integer 42 float_number = float(string_number) # Converts to float 42.0 # Converting numbers to strings number = 3.14 string_from_int = str(int_number) # Converts integer 42 to string "42" string_from_float = str(number) # Converts float 3.14 to string "3.14" print("Integer:", int_number) print("Float:", float_number) print("String from int:", string_from_int) print("String from float:", string_from_float)
Converting between data types is essential when working with user input, file data, or external sources. You often need to change a string representing a number into an actual numeric type for calculations, or convert a number back to a string for display. However, not all conversions are always possible. If you try to convert a string that does not represent a valid number, such as "hello", to an integer or float, Python will raise a ValueError. This is known as an invalid literal error. You should always ensure your string contains only numeric characters (with an optional decimal point for floats) before attempting conversion, or handle potential errors using exception handling.
1. What happens if you try to convert a non-numeric string like "apple" to an integer using int("apple")?
2. Which functions can be used to convert a float to a string?
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What happens if I try to convert a non-numeric string to an integer or float?
How can I safely handle conversion errors in Python?
Can you show an example of exception handling for invalid conversions?
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1234567891011121314# Converting strings to integers and floats string_number = "42" int_number = int(string_number) # Converts to integer 42 float_number = float(string_number) # Converts to float 42.0 # Converting numbers to strings number = 3.14 string_from_int = str(int_number) # Converts integer 42 to string "42" string_from_float = str(number) # Converts float 3.14 to string "3.14" print("Integer:", int_number) print("Float:", float_number) print("String from int:", string_from_int) print("String from float:", string_from_float)
Converting between data types is essential when working with user input, file data, or external sources. You often need to change a string representing a number into an actual numeric type for calculations, or convert a number back to a string for display. However, not all conversions are always possible. If you try to convert a string that does not represent a valid number, such as "hello", to an integer or float, Python will raise a ValueError. This is known as an invalid literal error. You should always ensure your string contains only numeric characters (with an optional decimal point for floats) before attempting conversion, or handle potential errors using exception handling.
1. What happens if you try to convert a non-numeric string like "apple" to an integer using int("apple")?
2. Which functions can be used to convert a float to a string?
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