Javascript Math Pow Vs Multiplication

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Michael Zippo 04.11.2021

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While strings can be multiplied by integers to create a repeating sequence, strings cannot be multiplied by floating point numbers. Otherwise, Python returns an error.

In this article, we are going to talk about the error " typeerror: cannot multiply sequence by non-int of type ’float’" and why it is triggered. We are going to examine an example scenario with this error present so that we can fix it.

type error: cannot multiply sequence by noninteger of type ’float’

Let’s throw a take a look at our error message and see what it tells us:

Our error is a TypeError. This means that we are trying to perform an operation on a value whose data type does not take not support this operation. For example, if you try to concatenate an integer and a string, a type error is returned.

The error tells us that we are multiplying a sequence, also called string , from a floating point number . This is not supported by Python.

There are two types of numbers in Python: integers and floating point numbers. Integers are integers while floating point numbers are decimal.

Strings can be multiplied by integers. Consider this example:

Our code returns: SconeSconeScone. When you multiply a string by an integer , a repeating sequence of that string is created.

Strings cannot be multiplied by floating point numbers. If you tried to multiply our "scone" string by 3.3, what would Python do ? You cannot have 0.3 of a string. Then an error is returned.

An example scenario

This error is commonly encountered when using input () declarations . Let’s look at a program that calculates a 5% discount on a purchase made in a store.

We have declared a variable called a value that stores how much the customer spent on a purchase. This value is collected from the user using the input () method.

Next, have I like to declare a variable called discount. This stores the 5% discount that we will apply to purchases as a decimal number. We then calculate the discount percentage by multiplying "value" and "discount" together. Then we subtract that number from the total cost of the product.

We use round () method to round the value of "final_cost" to two decimal places. Then we print this value to the console.

Let’s try to run our code:

Oh no. An error was returned. Let’s fix this error.

The error " Type error: Cannot multiply sequence for non-integer of type ’float’ " is caused by the multiplication of a string and a floating point number.

This error occurred in our previous program because in put () returns a string. This means that even if we insert a number into our program, it will be stored as a string.

To solve this problem, we can convert the value that the user enters into the program into a variable point value number. We can do this using the float () method :

The float () method is surrounded by the input () method. The float () method converts the string value returned by input () to a floating point number. This allows us to multiply the "value" and the "discount" because they are two numbers.

Let’s try to run our code again:

Our code works! Our program tells us that a 5% discount on the value of a $ 12.99 purchase causes the final product to cost $ 12.34 .