Squared Function in JavaScript

Code Analysis

The provided code snippet is written in JavaScript. It defines a function squared and then calls this function with the argument 9.

Code Breakdown

Function Definition

function squared(num) {
    return num * num;
}

• Function Name: squared
  • This is the name of the function, indicating its purpose to compute the square of a number.
• Parameter: num
  • The function takes a single parameter named num, which represents the number to be squared.
• Return Statement: return num * num;
  • The function returns the result of multiplying num by itself, effectively computing its square.

Function Invocation

console.log(squared(9));

• Function Call: squared(9)
  • This calls the squared function with the argument 9.
• Output Statement: console.log(...)
  • The console.log function is used to print the result of squared(9) to the console.

Detailed Explanation

1. Function Creation: The function squared is created to compute and return the square of a given number.

   • Example: If num is 3, num * num evaluates to 9.

2. Function Execution: When squared(9) is called:

   • The parameter num within the function takes the value 9.
   • The function computes 9 * 9, which equals 81.
   • The function then returns 81.

3. Output Display: The returned value 81 is passed to console.log, which prints 81 to the console.

Additional Example

For clarity, consider another example where the function is called with a different argument:

console.log(squared(5));

• The function squared is called with 5.
• Inside the function, num is 5, and 5 * 5 equals 25.
• The function returns 25, which is then printed to the console.

Summary

The code defines a function to compute the square of a number and demonstrates its usage with an example. The process involves defining the function, calling it with an argument, and printing the result.