Getting absoulte values in Python with
Python has a built in function called
abs() that is used to find the absolute value from an interget or float value.
Absolute values are values that return a magnitue of a given number. If I put it in more simple tems, magnitue of a number tells us how far they are from zero in the number line.
For negative numbers
- sign is not considered.
>>> x, y = -10.11, -10 >>> abs(x) >>>10.11 >>>abs(y) >>>10
Like most of python builtins it also has a dunder method
>>> y = -10 >>> y.__abs__() >>> 10
Real World Example
Suppose you are given a chart of temprature that has temprature values and you need to find the value that is closest to 0.
class TempratureReader: def closest_to_zero(self, readings: List[float]) -> float: result = readings for reading in readings: if abs(reading) < abs(result): result = reading elif abs(reading) == abs(result): result = max(result, reading ) return result
>>> t = TempratureReader() >>> t.closest_to_zero([10.11,-35.11,22.11, -2.1, -1.1, 1.1]) >>> 1.1
absoulte values of other types
- For complex number,
abs()returns the maginitudu.
>>> num = complex(3, 10) >>> num >>> (3+10j) >>> abs(num) >>> 10.44030650891055
Decimalvalues it just works like
floatjust returns the postive value.