what is o(n) of math.max function code example

Example 1: math.max in javascript

Math.max() function returns the largest of the zero or more numbers given as input parameters.
Math.max(1,10,100); // return 100

Example 2: javascript get array min and max

//get min/max value of arrays
function getArrayMax(array){
   return Math.max.apply(null, array);
}
function getArrayMin(array){
   return Math.min.apply(null, array);
}
var ages=[11, 54, 32, 92];
var maxAge=getArrayMax(ages); //92
var minAge=getArrayMin(ages); //11