Why absolute value of any number is always positive

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The heading, |x|=+, -x, IS ""POSSIBILITIES"", WHEN WE Don't KNOW SIGN OF x,
When you write |-1| sign of quantity inside is known.
HUMAN IS MALE OR FEMALE, BUT,
MY SON, (When quantity is specific) you don't give options

Dharmarajan-ctld
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Please correct the heading :
"replace positive by non negative""

Dharmarajan-ctld