Eloquent javaScript (3rd ed.) exercises

Eloquent.js

// Write loop That make seven calls to console.log to display a pyramid of # (Page 37)

let triangle = '';
for (let i = 0; i < 7; i++) {
  triangle += '#';
  console.log(triangle);
}

//Print numbers from 1 to 100. For numbers divisible by 3, print Fizz ; For numbers divisible by 5, print Buzz; For numbers divisible by both, print FizzBuzz (Page 37)
let result = '';
for (let i = 1; i <= 100; i++) {
  if (i % 3 === 0 && i % 5 === 0) {
    result = 'FizzBuzz';
  } else if (i % 3 === 0) {
    result = 'Fizz';
  } else if (i % 5 === 0) {
    result = 'Buzz';
  } else {
    result = i;
  }
  console.log(result);
}


//Create 8 X 8 Chess board (Page 38)
const chessBoard = (size) => {
  let square = '';
  for (let i = 1; i <= size * size; i++) {
    if (i % size === 0) {
      square += '#\n';
    } else if (i % 2 === 0) {
      square += '#';
    } else {
      square += ' ';
    }
  }
  console.log(square);
};

chessBoard(8);



//create a fn to mimic Math.min method (Page 56)
const findMin = (a, b) => {
  const smallerNum = a < b ? a : b;
  return smallerNum;
};

findMin(3, 4);



// Recursive fn to check even or odd nums (Page 56)
const isEven = (num) => {
  if (num === 0) {
    return true;
  } else if (num === 1) {
    return false;
  } else {
    return isEven(num - 2);
  }
};

isEven(13);



// Fn to count a given character in a string (Page 56)
const countChar = (string, character) => {
  const strToArr = string.split('');
  const filterChar = strToArr.filter((char) => char === character);
  return filterChar.length;
};

countChar('gagan', 'a');