text: -- examples on numeric functions
  
  -- absolute value
  select abs(10), abs(-10);
  
  -- ceiling
  select ceil(5.8), ceil(-5.2);
  
  -- floor
  select floor(5.8), floor(-5.2);
  
  -- module
  select mod(8, 3), mod(8, 4), mod(8.3, 5);
  
  -- power
  select power(2, 1), power(2, 3);
  select pow(2, 1), pow(2, 3);
  
  -- e raised to the power of
  select exp(1);
  
  -- square root
  select sqrt(25), sqrt(5);
  
  -- 2201F ERROR: cannot take square root of a negative number
  select sqrt(-2);
  
  -- natural logarithm, or for a given base
  select ln(exp(1)), log(exp(1)), log(10, 100);
  
  -- rounding
  select round(5.75), round(5.75, 0), round(5.75, 1), round(5.75, -1);
  
  -- truncating
  select trunc(5.75), trunc(5.75, 0), trunc(5.75, 1), trunc(5.75, -1);
  
  -- check negative, zero, positive
  select sign(-2.3), sign(0), sign(42);
  
  -- 3.14...
  select pi();
  
  -- trigonometry
  select sin(pi()/2), cos(0), tan(pi()/4);
  