JavaScript | Array sort()

arr.sort() function is used to sort the array in place in a given order according to the compare() function. If the function is omitted then the array is sorted in ascending order.

Syntax:
arr.sort([compareFunction])

Arguments
The only argument to this function is a compare function that is used to sort the elements according to different attributes and in the different order.

compareFunction(a,b) < 0

Then a comes before b in the answer.

compareFunction(a,b) > 0

Then b comes before a in the answer.

compareFunction(a,b) = 0

Then the order of a and b remains unchanged.

Return value
This function returns the reference of the sorted original array.

Examples for the above function are provided below:

Example 1:

var arr = [2, 5, 8, 1, 4]
print(arr.sort());
print(arr);

Output:

1,2,4,5,8
1,2,4,5,8

In this example the function sort() arranges the elements of the array in ascending order.

Example 2:

var arr = [2, 5, 8, 1, 4]
print(arr.sort(function(a, b) {
  return a + 2 * b;
}));
print(arr);

Output:

2,5,8,1,4
2,5,8,1,4

In this example the function sort() the elements of the array are sorted according the function applied on each element.

Codes for the above function are provided below:

Program 1:

<script> 
// JavaScript to illustrate sort() function 
  
function func() { 
  
    //Original string 
    var arr = [2, 5, 8, 1, 4] 
  
    //Sorting the array 
    document.write(arr.sort()); 
    document.write("<br>"); 
    document.write(arr); 
} 
func(); 
</script> 

Output:

1,2,4,5,8
1,2,4,5,8

Program 2:

<script> 
// JavaScript to illustrate sort() function 
  
function func() { 
  
    // Original array 
    var arr = [2, 5, 8, 1, 4]; 
  
    document.write(arr.sort(function(a, b) { 
    return a + 2 * b; 
})); 
document.write("<br>"); 
document.write(arr); 
} 
func(); 
</script> 

Output:

4,1,8,5,2
4,1,8,5,2

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