Convert Float to Int in Python
In Python, there are many situations where we have to convert float values to int values. Many approaches can be used for converting float to int values:
- conversion using int() .
- conversion using math.floor() and math.ceil() .
- conversion using round() .
- conversion using math.trunc() .
How to Convert Float to Int in Python?
We can convert a float value to an int using Type conversion in Python. Type Conversion is an explicit way of changing an operand to a certain type. Python comes with a few in-built methods to achieve this.
Displaying a floating value as a number or a percentage is a frequent application for converting a float to an integer. Integer values can be shown as such without affecting the actual data type because they are immutable. So when calculating efficiency, integer values are always preferred over floating-point values.
So for all this process, we use Python inbuilt functions for converting the float value to the integer values, for example int() function, etc.
Example: Let's take a look at int values in Python
Output:
What is Float in Python?
The float type represents the floating point number in Python. A decimal point is used to separate the integer and fractional elements of the word "float," which denotes real numbers.
Python uses 64-bit double-precision numbers to represent float values. Any floating-point number can have a maximum value of approximately 1.8 x 10^308. The Python string inf will indicate any number bigger than 1.8 x 10^308 . 77.44 , 42.3e19 , and -32.64+e12 are examples of floating point numbers.
Example: Let's take a look at float values in Python
Output:
What is int in Python?
In Python is a whole number having no decimal points. Integer values can be of any size and can be negative or positive. Int Class defines Integer values. As integer does not consist of any decimal points and hence can extend up to the computer’s limit. However, you can subsequently change it. By default, Int is decimal, or base 10, although you can later convert it. Examples of some integer values are 20 , 1 , -10, etc.
Example: Let's take a look at int value in Python
Output:
Methods to convert float to int in Python
For converting float to int in Python, we can use many methods. These methods use type conversion or inbuilt library functions enlisted below:
- conversion using int()
- conversion using math.floor() and math.ceil()
- conversion using round()
- conversion using math.trunc()
Method 1: Conversion using int()
Python has a variety of built-in methods that can make programming easier. One such method is int() , which quickly transforms any data type into an integer. The function trims the values after the decimal points and accepts a float-point variable as an argument. The result is an integer or whole number as the output. Let's look at the syntax of int() method:
Syntax:
Return Value:
This method returns an integer value .
Example 1: Let's take an example of how the int() method is used to convert the float value to int value:
Output:
Example 2: The int() function typically rounds off the results to the nearest integer before the decimal point. However, there are times when an exception occurs, so we cannot predict or define the behavior in those situations.
Output: It rounded out the value because there is an insignificant difference between 3.99999999999999999 and 4.0 .
Method 2: Conversion using math.floor() and math.ceil()
Use the floor() method and pass the value as the method's parameter if you want to convert a float value to an int value that is no larger than the input. While using the ceil() method, you can change it to a value greater than the original.
Syntax:
Return Value: This method returns an integer value converting on the fact that ceil() is used or floor() is used.
Example:
Let's take an example of how the floor() and ceil() method is used to convert the float value to int value:
Output:
Method 3: Conversion using round()
Using the round() method, a float value can be converted to an int value, which is the closest integer value. When there is an equal difference between smaller and larger values, the larger integer is chosen.
Syntax:
Return Value: This method returns an integer value rounding the given value to the nearest integer.
Example:
Let's take an example of how the round() method is used to convert the float value to int value:
Output:
Method 4: Conversion using math.trunc()
Python has a built-in function called trunc() that helps in providing an integer value. The method takes the float-point value and ignores the remainder of the value. Let's look at the example below to see how the trunc() method is used:
Syntax:
Return Value: This method returns an integer value removing the decimal part of the value.
Example:
Let's take an example of how the trunc() method is used to convert the float value to int value:
Какую и как использовать функцию, чтобы float сделать int?
Какую функцию нужно использовать, чтобы передать GET запросом строку с кирилическими символами?
чтобы передать GET запросом строку с кирилическами символами какую функцию преобразования кирилицы.
ОШИБКА [Error] cannot convert ‘int*’ to ‘float*’ for argument ‘1’ to ‘void Syma(float*,int*,int)
Какая то проблема с указателями,незнаю,не хочет щитать суму парних чисел в второй.
Какую функцию можно использовать как пробел?
нужно чтобы между данными был пробел, как это осуществить?
How to convert Float to Int in Python?
Converting a float value to an int is done by Type conversion, which is an explicit method of converting an operand to a specific type. However, it is to be noted that such type of conversion may tend to be a lossy one (loss of data). Converting an int value like 2 to floating-point will result in 2.0, such types of conversion are safe as there would be no loss of data, but converting 3.4 to an int value will result in 3 leading to a lossy conversion.
Examples:
Method 1: Conversion using int():
To convert a float value to int we make use of the built-in int() function, this function trims the values after the decimal point and returns only the integer/whole number part.
Return: integer value
Example 1: Number of type float is converted to a result of type int.
Python3
Example 2: In most cases the int() function rounds off the result to an integer lesser than or equal to the input, but the behavior is neither definite nor predictable. One such example is shown below.
Python3
A float value can be converted to an int value no larger than the input by using the math.floor() function, whereas it can also be converted to an int value which is the smallest integer greater than the input using math.ceil() function. The math module is to be imported in order to use these methods.
Syntax: math.floor(x)
Parameter:
x: This is a numeric expression.
Returns: largest integer not greater than x.
Syntax: math.ceil(x)
Parameter:
x: This is a numeric expression.
Returns: Smallest integer not less than x.
Example : In the below example conversion from float to int has been achieved using the floor() and ceil() methods, the former returns an int no larger than the input and the latter returns the smallest integer larger than the input.
How to convert float to int with Java
I used the following line to convert float to int, but it’s not as accurate as I’d like:
The result is : 8 (It should be 9 )
When a = -7.65f , the result is : -7 (It should be -8 )
What’s the best way to do it ?
9 Answers 9
Using Math.round() will round the float to the nearest integer.
Actually, there are different ways to downcast float to int, depending on the result you want to achieve: (for int i , float f )
round (the closest integer to given float)
note: this is, by contract, equal to (int) Math.floor(f + 0.5f)
truncate (i.e. drop everything after the decimal dot)
ceil/floor (an integer always bigger/smaller than a given value if it has any fractional part)