elisa

exercises.js

function returnCustomStepArray(num1, num2, step){
    let myArray = [];

    //Edge Cases
    //Receive only numbers
    if(typeof num1 !==  "number" || typeof num2 !== "number" || typeof step !== "number"){
        throw new Error("type error; numbers are expected");
    }

    //Round numbers down
    num1 = Math.floor(num1);
    num2 = Math.floor(num2);
    step = Math.floor(step);

    //Receive only numbers in ascending order
    if(num1 >= num2){
        throw new Error("numbers should be in ascending order");
    }
    

    for(let i = num1; i <= num2; i= i+step){
      myArray.push(i);
    }

    return myArray
}


function sumNumbers(arr) { 
    let temp = 0;
  
    for(let i=0; i <= arr.length-1; i++){
      if(typeof arr[i] != "number"){
          throw new Error("type error, an array of numbers is expected");
      }else{
          temp += arr[i];
      }
    }
  
  return temp;
  }
  

//EXERCISES: 

// 1) calculate the sum of 1 to 100
console.log(sumNumbers(returnCustomStepArray(1, 100, 1)));


// 2) calculate the sum of the even numbers between 50 and 1,000 
console.log(sumNumbers(returnCustomStepArray(50, 1000, 2)));


//3) calculate the sum of the factors of 3 between 33 and 3333
console.log(sumNumbers(returnCustomStepArray(33, 3333, 3)));

random.js

function random(max) {
  return Math.floor(Math.random() * max);
}

range.js

//add a step value (number) that will control how the next value in the array is computed 

function returnCustomStepArray(num1, num2, step){
    let myArray = [];

    //Edge Cases

    //Receive only numbers
    if(typeof num1 !==  "number" || typeof num2 !== "number" || typeof step !== "number"){
        throw new Error("type error; numbers are expected");
    }

    //Round numbers down
    num1 = Math.floor(num1);
    num2 = Math.floor(num2);
    step = Math.floor(step);

    //Receive only numbers in ascending order
    if(num1 >= num2){
        throw new Error("numbers should be in ascending order");
    }
    

    for(let i = num1; i <= num2; i= i+step){
      myArray.push(i);
    }

    return myArray
}

console.log(returnCustomStepArray(2, 8, 2));

// 2) calculate the even numbers between 50 and 1,000 
let evenNumbers = returnCustomStepArray(50, 1000, 2);
console.log(evenNumbers);

//3) calculate the factors of 3 between 33 and 3333
let factorsOfThree = returnCustomStepArray(33, 3333, 3);
console.log(factorsOfThree);

sum.js

// Write a function that returns the sum of the numbers in an array

function sumNumbers(arr) { 
  let temp = 0;

  for(let i=0; i <= arr.length-1; i++){
    if(typeof arr[i] != "number"){
        throw new Error("type error, an array of numbers is expected");
    }else{
        temp += arr[i];
    }
  }

return temp;
}

console.log(sumNumbers([2, 4, 7]);
            
// 1) calculate the sum of 1 to 100
let numbersOnetoOneHundred = [];

for(let i= 1; i<= 100; i++){
  numbersOnetoOneHundred.push(i);
}

console.log(sumNumbers(numbersOnetoOneHundred));