eloquentjavascript : chapter 2

file.js

// looping a triangle
for(var i=0; i < 8; i++) { 
  console.log('#'.repeat(i)); 
}

// fizzbuzz
for(var i=1; i < 101; i++) { 
  if(i % 3 == 0 && i % 5 == 0) {
    console.log(i + ' FizzBuzz');
  } else if(i % 3 == 0) {
    console.log(i + ' Fizz');
  } else if(i % 5 == 0) {
    console.log(i + ' Buzz');
  } else {
    console.log(i);
  }
}

// chess board
var boardsize = 8;
for(var row = 0; row < boardsize; row++) {
  var r = '';
  for(var col = 0; col < boardsize; col++) {
    if(row % 2 == 0) {
      if(col % 2 == 0) {
        r += ' ';    
      } else {
        r += '#';   
      }
    } else {
      if(col % 2 == 0) {
        r += '#';    
      } else {
        r += ' ';   
      }
    }
  }
  console.log(r);
}

output

// looping a triangle
#
##
###
####
#####
######
#######

// fizzbuzz
1 
2 
3 Fizz
4 
5 Buzz 
6 Fizz 
7 
8 
9 Fizz 
10 Buzz 
11 
12 Fizz 
13 
14 
15 FizzBuzz 
16 
17 
18 Fizz 
19 
20 Buzz 
21 Fizz 
22 
23 
24 Fizz 
25 Buzz 
26 
27 Fizz 
28 
29 
30 
31 
32 
33 Fizz 
34 
35 Buzz 
36 Fizz 
37 
38 
39 Fizz 
40 Buzz 
41 
42 Fizz
43 
44 
45 FizzBuzz
46 
47 
48 Fizz
49 
50 Buzz 
51 Fizz 
52 
53 
54 Fizz
55 Buzz 
56 
57 Fizz 
58 
59 
60 FizzBuzz 
61 
62 
63 Fizz 
64 
65 Buzz 
66 Fizz 
67 
68 
69 Fizz 
70 Buzz 
71 
72 Fizz 
73 
74 
75 FizzBuzz 
76 
77 
78 Fizz 
79 
80 Buzz 
81 Fizz 
82 
83 
84 Fizz 
85 Buzz 
86 
87 Fizz 
88 
89 
90 FizzBuzz
91 
92 
93 Fizz 
94 
95 Buzz 
96 Fizz
97 
98 
99 Fizz
100 Buzz 

// chess board
 # # # # 
# # # # 
 # # # # 
# # # # 
 # # # # 
# # # # 
 # # # # 
# # # #