How to convert float to string in Python
Datatypes
In some languages, the developer needs to explicitly specify the datatype. For example, in C++, variables are declared by first specifying the datatype and then following it with the variable name:
int my_int;
float my_float;
string my_string;
On the other hand, in languages like JavaScript or Python, there is no need to explicitly mention a variable’s datatype at the time of declaration as the datatype is set according to the value assigned to it.
#JavaScript
var my_int = 123
var my_float = 123.123
var my_string = "123"
#Python
my_int = 123
my_float = 123.123
my_string = "123"
Later, after the variable’s initial declaration, it can be type-casted in a different datatype. Type-casting comes in handy when avoiding ambiguous comparisons between different data types and operators/functions performing unexpectedly.
######## FAULTY COMPARISON ########my_float = 123.123my_string = "123.123"equal = (my_float == my_string)if equal:print("Variables are equal")else:print("Variables are not equal")######## UNEXPECTED FUNCTIONALITY #########Want to concatenate 123.0 and string "my float is: "#Throws an errormy_float = 123.0my_string = "my float is: "result = my_string + my_floatprint(result)
To deal with such scenarios, we can easily convert datatypes in Python using type-casting:
| Syntax | Description |
|---|---|
str() |
Cast to string |
float() |
Cast to float |
int() |
Cast to int |
To check the type of a variable, use the
type()method.
In the code snippet below, observe how we can avoid the error in the previous example by type-casting float to string in Python:
#Want to concatenate 123.0 and string "my float is: "my_float = 123.0my_string = "my float is: "result = my_string + str(my_float)print(result)
