What is this abs function of math.h

Answer 1

y-x is -1,
so abs(y-x) = abs(-1) = 1

Answer 2

abs gives you the distance from your number to 0;

e.g
abs from -5 would be 5
abs from 5 would be also 5

Answer 3

It represents the modulus function of mathematics, which is defined as:

{ x, if x>0
f(x) = { 0, if x=0
{ -x, if x<0

y-x is <0, so it will be negative of y-x, which results in 1...

Also note that abs is in stdlib.h, math.h has fabs which satisfies same purpose...

Answer 4

If x=5 and y=4 then z= abs(y-x) means.?