USER INPUT --- HOME --- CHECKING VARIABLE EXISTANCE
Arithmetic operations in BASH is done by,
|
|
| + -> Addition |
echo $(( 20+5 )) |
| - -> Subtraction |
echo $(( 20-5 )) |
| * -> Multiplication |
echo $(( 20*5 )) |
| / -> Divison |
echo $(( 20/5 )) |
|
|
| ++,-- |
Post increment/decrement |
| ++,-- |
Pre increment/decrement |
| +,- |
Uranary plus/minus |
| !,~ |
Logical, Bitwise negation |
| ** |
Exponential |
| *,/,% |
Multiplu, Devide, Remainder |
| +,- |
Addition, Subtraction |
| <<,>> |
Left/Right bitwise shift |
| <=,>=,<,> |
Comparisons |
| ==,!= |
Equality, inequality |
| & |
Bitwise AND |
| ^ |
Bitwise XOR |
| ! |
Bitwise OR |
| && |
Logical AND |
| || |
Logical OR |
| ? : |
Conditional |
| = |
Assignment |
| , |
Comma |