How to use the convert conversion function

Usage is to understand the data type and target data type to be converted, and call the corresponding conversion function to achieve conversion.

#The convert function is a function used to convert one data type to another data type. In programming, we often need to convert different types of data to meet specific needs. Below I will explain in detail how to use the conversion function.

First, to use the conversion function, we need to understand the data type to be converted and the target data type. Common data types include integers (int), floating point numbers (float), strings (string), etc. Suppose we want to convert a string to an integer, we can use the int() function to achieve this.

For example, we have a string variable num_str whose value is "123". We can convert it to integer type using int() function.

num_str = "123"
num_int = int(num_str)
print(num_int)

Execute the above code, and the output result is 123, indicating that we successfully converted the string into an integer.

In addition, the conversion function can also be used to convert other data types into string types. For example, we have an integer variable num_int whose value is 123. We can convert it to string type using str() function.

num_int = 123
num_str = str(num_int)
print(num_str)

Execute the above code, and the output result is "123", indicating that we successfully converted the integer into a string.

In addition to basic data type conversion, conversion functions can also be used to convert between different container types. For example, we can use the list() function to convert a string to a list type.

str_var = "abc"
list_var = list(str_var)
print(list_var)

Execute the above code, and the output result is [‘a’, ‘b’, ‘c’], indicating that we successfully converted the string into a list.

In addition, some conversion functions can also receive additional parameters to specify conversion rules. For example, the float() function can convert a string to a floating point number, and you can specify the number of digits after the decimal point.

num_str = "3.1415926"
num_float = float(num_str)
print(num_float)
num_rounded = float(num_str, 2)
print(num_rounded)

Execute the above code, and the output result of the first print statement is 3.1415926, which means that we convert the string into a floating point number. The output result of the second print statement is 3.14, which means that we convert the string into a floating point number and specify the number of digits after the decimal point to be 2.

In summary, using the conversion function requires understanding the data type and target data type to be converted, and calling the corresponding conversion function to achieve the conversion. Sometimes it is necessary to specify additional parameters to control the conversion rules. By rationally using conversion functions, we can flexibly handle different types of data in programming.

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