Difference between Procedural and Declarative Knowledge

Procedural Knowledge

Procedural or imperative knowledge clarifies how to perform a certain task. It lays down the steps to perform. For example, - how to copy an array using javascript in a procedural way.

Example

var a=[1, 2, 3, 4, 5];
var b=[];
for(var i=0;i < a.length;i++) {
   b.push(a[i]);
}
console.log(b);

Output

[1, 2, 3, 4, 5]

Declarative Knowledge

Declarative or functional knowledge clarifies what to do to perform a certain task. It lays down the function to perform. For example, - how to copy an array using javascript in a declarative way.

Example

var a=[1, 2, 3, 4, 5];
var b=a.map(function(number){
   return number*1
});
console.log(b);

Output

[1, 2, 3, 4, 5]

The following are some of the important differences between Procedural Knowledge and Declarative Knowledge.