Find the min/max element of an Array using JavaScript

The minimum and maximum element in an array can be found using 2 approaches:

Method 1: Using Math.min() and Math.max()
The min() and max() methods of the Math object are static functions that return the minimum and maximum element passed to it. These functions could be passed an array with the spread(…) operator. The spread operator allows an iterable to expand in places where multiple arguments are expected. In this case, it automatically expands array and gives the numbers to the functions.

Syntax:

minValue = Math.min(...array);
maxValue = Math.max(...array);

Example 1:

Output:

• Before clicking the button:
  
• After clicking the button:
  

Method 2: Iterating through the array and keeping track of the minimum and maximum element

The minimum and maximum element can be kept track by iterating through all the elements in the array and updating the minimum and maximum element upto that point by comparing them to the current minimum and maximum values. Initially, the minimum and maximum values are initialized to Infinity and -Infinity.

Syntax:

minValue = Infinity;
maxValue = -Infinity;

for (item of array) {
    // find minimum value
    if (item < minValue)
    minValue = item;
                
    // find maximum value
    if (item > maxValue)
    maxValue = item;
}

Example:

Output:

• Before clicking the button:
  
• After clicking the button:
  

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