When working with variables in Python, it’s often necessary to determine whether a variable is a number. There are a few simple methods you can use to achieve this.
Method 1: Using the Type Function
One way to check if a variable is an integer is by using the type() function. This function takes the variable as an argument and returns its type. To check if a variable is an integer, you can compare the result of type() to the int class.
Example:
age = 1
type(age) == int # True
Similarly, you can use type() to check if a variable is a floating-point number. In this case, compare the result to the float class.
Example:
fraction = 0.1
type(fraction) == float # True
Method 2: Using the isinstance() Function
An alternative method to check if a variable is a number is by using the isinstance() function. This function takes two arguments: the variable and the desired class. To check if a variable is an integer, you can use isinstance() with the int class as the second argument.
Example:
age = 1
isinstance(age, int) # True
Similarly, you can use isinstance() to check if a variable is a floating-point number. In this case, use the float class as the second argument.
Example:
fraction = 0.1
isinstance(fraction, float) # True
Using these methods, you can easily determine whether a variable is a number in Python.