Evens in one line
Write code that prints EXACTLY the target output.
Preview challenge → Free account required to solveJAVASCRIPT IN PRACTICE
Program the output - the reverse of "Predict the result": write code that prints exactly the given string to the console. Trains control over what reaches the output.
Solving requires a free account.
Pick a challenge and explore the rules through a concrete example.
Write code that prints EXACTLY the target output.
Preview challenge → Free account required to solveWrite code that prints EXACTLY the target output.
Preview challenge → Free account required to solveWrite code that prints EXACTLY the target output.
Preview challenge → Free account required to solveAvailable challenges: 5.
See all challenges →The full catalogue requires a free account.
JavaScript output challenges practise precise text construction and control over console.log output. Similar precision is useful for reports, exports and diagnostic messages where value order and separators matter.
Read the expected output as an exact text specification. Write code that prints the required values with the correct order, separators and line breaks. Remove extra debug messages before checking. Correct calculations are not enough if the output format differs.
Read the description without logging in. Solving requires a free account.