Callback exercises

All executions of the exercises will display on the console! green arrow

Exercise 1

        
Function declaration:

        
          const processFunction = (number, callback) => {
            callback(number)
          }

Exercise 2

        
Function declaration:

        
          const calculator = (a, b, callback) => {
            return callback(a, b)
          }
          
          const addition = (a, b) => {
            return a + b
          }
        
      
        
Code for its execution:

        
          const result = calculator(2, 5, addition)
          console.log(result)

Exercise 3

        
Function declaration:

        
          const waitAndWave = (name, callback) => {
            setTimeout(() => {
              callback(name)
            }, 2000)
          }
          
          const wave = (name) => {
            console.log(`How are you doing, ${name} ?`)
          }
        
      
        
Code for its execution:

        
          waitAndWave('John', wave)

Exercise 4

        
Function declaration:

        
          const processElements = (numbers = [], callback) => {
            numbers.forEach((number) => {
              callback(number)
            })
          }
          
          const screamNumber = (number) => {
            console.log(`YOUR NUMBER IS ${number}!!!!`)
          }
        
      
        
Code for its execution:

        
          processElements([2, 4, 6, 8], screamNumber)

Exercise 5

        
Function declaration:

        
          const processString = (word, callback) => {
            const capitalizedWord = word.toUpperCase()
            callback(capitalizedWord)
          }
          
          const showWord = (word) => {
            console.log(`Your capitalized word is ${word}`)
          }
        
      
        
Code for its execution:

        
          processString('hello', showWord)