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Python - abs method example

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The abs() function returns the absolute value of a number. 

The absolute value of the number x denoted |x|, is the non-negative value of x without regard to its sign.

Popular usage examples:

print(abs(2))     # 2.54
print(abs(-2))    # 2.54

print(abs(2.54))  # 2.54
print(abs(-2.54)) # 2.54

print(abs(0))     # 0

print(abs(3 + 5)) # 8
print(abs(3 - 5)) # 2

1. Documentation

Syntax
abs(number)
Parametersnumber - number whose absolute value is to be returned
ResultThe absolute value calculated from the number.
Description

abs() is a method that takes only one parameter and returns an absolute number parameter value. The absolute value of the number x denoted |x|, is the non-negative value of x without regard to its sign.

2. abs() custom implementation

def absoluteValue(x):
    if x < 0:
        return -x
    return x


print(absoluteValue(2))     # 2
print(absoluteValue(-2))    # 2
print(absoluteValue(0))     # 0

References

  1. Absolute value - Wikipedia
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