how to find absolute difference in c++ code example

Example 1: abs in cpp

int a =4;
int b =5;

int ans = abs(a-b); //ALWAYS RETURN POSITIVE NUMBER.

Example 2: absolute difference c++

val1 = abs(22); 
val2 = abs(-43); 
  
cout << "abs(22) = " << val1 << "\n"; 
cout << "abs(-43) = " << val2 << "\n";