| Operator | Description |
|---|---|
<= |
Less than or equal to |
>= |
Greater than or equal to |
< |
Less than |
> |
Greater than |
== |
Equal to |
!= |
Not equal to |
&& |
Logical AND |
| ` | |
expr1?expr2:expr3 |
Comparison (ternary) operator. if expression expr1 |
| evaluates to be non-zero (arithmetic true), then | |
| expr2; else expr3. |
# arithmetic true/false
[me@linuxbox ~]$ if ((1)); then echo "true"; else echo "false"; fi
true
[me@linuxbox ~]$ if ((0)); then echo "true"; else echo "false"; fi
false
# ternary operator example: "toggle"
[me@linuxbox ~]$ a=0
[me@linuxbox ~]$ ((a<1?++a:--a))
[me@linuxbox ~]$ echo $a
1
[me@linuxbox ~]$ ((a<1?++a:--a))
[me@linuxbox ~]$ echo $a
0