Operators Flashcards
(50 cards)
1
Q
+
A
add
2 +4 = 6
2
Q
+
A
add
2 +4 = 6
3
Q
-
A
subtract
4
Q
*
A
multiply
2 *4 = 8
5
Q
**
A
power of
2**4 = 16
6
Q
/
A
Divide
2/4.0 == 0.5
7
Q
%
A
modulus
2 % 4 ==2
8
Q
.
A
Dot access
“1”.to_i == 1
9
Q
::
A
Colon access
Module::Class
10
Q
[]
A
list brackets
[1,2,3]
11
Q
!
A
not
!true == false
12
Q
A
less than
13
Q
>
A
greater than
14
Q
> =
A
greater than or equal to
15
Q
<=
A
less than or equal to
16
Q
<=>
A
comparison
4 <=> 4 == 0
17
Q
==
A
equal
4 =4 = true
18
Q
===
A
Equality
4 ===4 = true
19
Q
!=
A
not equal
4 != 4 = false
20
Q
&&
A
Locical and (higher precedence) true && false = false
21
Q
||
A
Logical or (higher precedence) true || flash = true
22
Q
..
A
range inclusive (0..3).to_a = [0,1,2,3]
23
Q
…
A
Range non inclusive
(0…3).to_a = [0,1,2]
24
Q
@
A
Object scope
@var ; @@classvar
25
@@
Class scope
| @var ; @@classvar
26
$
global scope
| $stdin
27
-
subtract
28
*
multiply
| 2 *4 = 8
29
**
power of
| 2**4 = 16
30
/
Divide
| 2/4.0 == 0.5
31
%
modulus
| 2 % 4 ==2
32
.
Dot access
| "1".to_i == 1
33
::
Colon access
| Module::Class
34
[]
list brackets
| [1,2,3]
35
!
not
| !true == false
36
"
less than
37
>
greater than
38
>=
greater than or equal to
39
<=
less than or equal to
40
<=>
comparison
| 4 <=> 4 == 0
41
==
equal
| 4 =4 = true
42
===
Equality
| 4 ===4 = true
43
!=
not equal
| 4 != 4 = false
44
&&
```
Locical and (higher precedence)
true && false = false
```
45
||
```
Logical or (higher precedence)
true || flash = true
```
46
..
```
range inclusive
(0..3).to_a = [0,1,2,3]
```
47
...
Range non inclusive
| (0...3).to_a = [0,1,2]
48
@
Object scope
| @var ; @@classvar
49
@@
Class scope
| @var ; @@classvar
50
$
global scope
| $stdin
