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Introduction to JavaScript

bookChallenge: Variable Operations Practice

Task

  1. Create the variable num.
  2. Assign the value 29 to the variable num.
  3. Increase the num variable by 99.
  4. Decrease the num variable by 23.

              
123456789

            
let num;
num ___ 29;
console.log(num);

num ___ 99;
console.log(num);

num ___ 23;
console.log(num);
copy

The output should be:

29
128
105
  1. Assign values to the variable using the assignment operator (=).
  2. Use arithmetic operators to perform calculations on the variable (+= and -=).

              
123456789

            
let num;
num = 29;
console.log(num);

num += 99;
console.log(num);

num -= 23;
console.log(num);
copy

¿Todo estuvo claro?

¿Cómo podemos mejorarlo?

¡Gracias por tus comentarios!

Sección 3. Capítulo 5

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Suggested prompts:

Can you explain what the `+=` and `-=` operators do in JavaScript?

What would happen if I used `num = num + 99;` instead of `num += 99;`?

Can you show me how to do similar operations with another variable?

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bookChallenge: Variable Operations Practice

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Task

  1. Create the variable num.
  2. Assign the value 29 to the variable num.
  3. Increase the num variable by 99.
  4. Decrease the num variable by 23.

              
123456789

            
let num;
num ___ 29;
console.log(num);

num ___ 99;
console.log(num);

num ___ 23;
console.log(num);
copy

The output should be:

29
128
105
  1. Assign values to the variable using the assignment operator (=).
  2. Use arithmetic operators to perform calculations on the variable (+= and -=).

              
123456789

            
let num;
num = 29;
console.log(num);

num += 99;
console.log(num);

num -= 23;
console.log(num);
copy

¿Todo estuvo claro?

¿Cómo podemos mejorarlo?

¡Gracias por tus comentarios!

Sección 3. Capítulo 5
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