Assignments for The Complete JavaScript Course by Jonas Schmedtmann Help

Equality Operators: == vs. ===

  1. Declare a variable numNeighbours based on a prompt input like this:

prompt('How many neighbour countries does your contry have?');

  1. If there is only 1 neighbour, log to the console 'Only 1 border!' (use loose equality == for now).

  2. Use an else-if block to log 'More than 1 border' in case numNeighbours is greater than 1.

  3. Use an else block to log 'No borders' (this block will be executed when numNeighbours is 0 or any other value).

  4. Test the code with different values of numNeighbours, including 1 and 0.

  5. Change == to ===, and test the code again, with the same values of numNeighbours. Notice what happens when there is exactly 1 border! Why is this happening?

  6. Finally, convert numNeighbours to a number, and watch what happens now when you input 1.

  7. Reflect on why we should use the === operator and type conversion in this situation.

const numNeighbours = prompt( 'How many neighbour countries does your country have?' ); // LATER : This helps us prevent bugs const numNeighbours = Number( prompt('How many neighbour countries does your country have?') ); if (numNeighbours === 1) { console.log('Only 1 border!'); } else if (numNeighbours > 1) { console.log('More than 1 border'); } else { console.log('No borders'); }
Type Conversion and Coercion Logical Operators