create a loop of a loop in javascript

To create a loop of a loop, also known as a nested loop, in JavaScript, you can have one loop inside another loop. The first loop will control the outer loop, and the second loop will control the inner loop.

Here is an example of a nested loop that prints out a multiplication table for the numbers 1-10:

index.tsx
for (var i = 1; i <= 10; i++) {
    for (var j = 1; j <= 10; j++) {
        console.log(i * j);
    }
}
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In this example, the outer for loop iterates through the numbers 1-10, and the inner for loop also iterates through the numbers 1-10. For each iteration of the outer loop, the inner loop runs and prints out the product of i and j.

Nested loops can be useful for iterating over complex data structures or performing operations on multiple levels of a program. However, it's important to be cautious when using nested loops, as they can quickly become computationally expensive and negatively impact performance.