Summary - Console methods

Print a dataset neatly using console.group and console.table.

Summary - Console methods

The console methods you learned in this group serve different needs. console.log is for general output, warn and error for warnings and errors, table for a table view, group for organized groups, and time for measuring duration.

Using the right method makes output more readable and speeds up debugging. Now you will use them together by grouping a dataset and showing it as a table.

Exercise Group and table the products

Define an array called products. Each item should be an object with name and price properties (at least two items). Then open a group with console.group("Products"), call console.table(products) inside it, and close the group with console.groupEnd().

Show example solution

const products = [
  { name: "Pen", price: 25 },
  { name: "Notebook", price: 40 }
];

console.group("Products");
console.table(products);
console.groupEnd();

Exercise Measure and print a total

Start a timer with console.time("total"). Initialize an accumulator with let total = 0. Loop with for (let i = 1; i <= 100; i++) and add each i to total. Then print the duration with console.timeEnd("total") and print the result with console.log("Total:", total).

Show example solution

console.time("total");
let total = 0;
for (let i = 1; i <= 100; i++) {
  total += i;
}
console.timeEnd("total");
console.log("Total:", total);

Test yourself

Match the method to its purpose

console.log

General output
console.warn

Warning message
console.error

Error message
console.table

Array/Object table
console.group

Grouping outputs

Stop the timer

console.time("sorgu");
// sorgu çalışıyor
console.____("sorgu");

Show answer

console.time("sorgu");
// sorgu çalışıyor
console.timeEnd("sorgu");

Next lesson: try...catch basics

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