Arithmetic Operators Order of Precedence
Operators are evaluated in order of precedence. The levels are
listed in order of decreasing precedence (quoting form the bash man page).
id++ id--
variable post-increment and post-decrement
++id --id
variable pre-increment and
pre-decrement
- +
unary minus and plus
! ~
logical and bitwise negation
**
exponentiation
* / %
multiplication, division, remainder
+ -
addition, subtraction
<< >> left and right bitwise shifts
<= >= < >
comparison
== !=
equality and inequality
& bitwise AND
^
bitwise exclusive OR
|
bitwise OR
&& logical AND
||
logical OR
expr?expr:expr
conditional operator
= *= /= %= += -= <<= >>=
&= ^= |=
assignment
expr1 , expr2
comma
value1=5;value2=7
addition=$((
value1 + value2 ))
echo
"$value1 + $value2 = $addition "
value1=5;value2=7
subtraction=$((
value1 - value2 ))
echo
"$value1 - $value2 = $subtraction "
subtraction=$((
value2 - value1 ))
echo
"$value2 - $value1 = $subtraction "
value1=5;value2=7
division=$((
value1 / value2 ))
echo
"$value1 / $value2 = $division "
division=$((
value2 / value1 ))
echo
"$value2 / $value1 = $division "
value1=5;value2=7
multiplication=$((
value1 * value2 ))
echo
"$value1 * $value2 = $multiplication "
value1=5;value2=7
modulus=$(( value1
% value2 ))
echo
"$value1 % $value2 = $modulus "
modulus=$(( value2
% value1 ))
echo
"$value2 % $value1 = $modulus "
value1=5;value2=7
post_increment=$((
value1++ ))
echo
"$value1 after post increment = $post_increment "
post_decrement=$((
value2-- ))
echo
"$value2 after post decrement = $post_decrement "
value1=5;value2=7
pre_increment=$((
++value1 ))
echo
"$value1 after pre increment = $pre_increment "
pre_decrement=$((
--value2 ))
echo
"$value2 after pre decrement = $pre_decrement "
value1=5;value2=7
exponentiation=$((
value1 ** value2 ))
echo
"$value1 ** $value2 = $exponentiation "
exponentiation=$((
value2 ** value1 ))
echo
"$value2 ** $value1 = $exponentiation "
Arithmetic calculations using let command
value1=5;value2=7
Arithmetic calculations using let command
value1=5;value2=7
let addition=value1+value2
echo
"$value1 + $value2 = $addition "
value1=5;value2=7
let subtraction=value1-value2
echo
"$value1 - $value2 = $subtraction "
let subtraction=value2-value1
echo
"$value2 - $value1 = $subtraction "
value1=5;value2=7
let division=value1/value2
echo
"$value1 / $value2 = $division "
let division=value2/value1
echo
"$value2 / $value1 = $division "
value1=5;value2=7
let multiplication=value1*value2
echo
"$value1 * $value2 = $multiplication "
value1=5;value2=7
let modulus=value1%value2
echo
"$value1 % $value2 = $modulus "
let modulus=value2%value1
echo
"$value2 % $value1 = $modulus "
value1=5;value2=7
let post_increment=value1++
echo
"$value1 after post increment = $post_increment "
let post_decrement=value2--
echo
"$value2 after post decrement = $post_decrement "
value1=5;value2=7
let pre_increment=++value1
echo
"$value1 after pre increment = $pre_increment "
let pre_decrement=--value2
echo
"$value2 after pre decrement = $pre_decrement "
value1=5;value2=7
let exponentiation=value1**value2
echo
"$value1 ** $value2 = $exponentiation "
let exponentiation=value2**value1
echo
"$value2 ** $value1 = $exponentiation "
Arithmetic calculations using expr command
value1=5;value2=7
addition=$(
expr $value1 + $value2 )
echo
"$value1 + $value2 = $addition "
value1=5;value2=7
subtraction=$(
expr $value1 - $value2 )
echo
"$value1 - $value2 = $subtraction "
subtraction=$(
expr $value2 - $value1 )
echo
"$value2 - $value1 = $subtraction "
value1=5;value2=7
division=$(
expr $value1 / $value2 )
echo
"$value1 / $value2 = $division "
division=$(
expr $value2 / $value1 )
echo
"$value2 / $value1 = $division "
value1=5;value2=7
multiplication=$(
expr $value1 \* $value2 )
echo
"$value1 * $value2 = $multiplication "
value1=5;value2=7
modulus=$(
expr $value1 % $value2 )
echo
"$value1 % $value2 = $modulus "
modulus=$(
expr $value2 % $value1 )
echo
"$value2 % $value1 = $modulus "Arithmetic calculations using bc command
value1=5;value2=7
addition=$(
echo $value1+$value2 |bc )
echo
"$value1 + $value2 = $addition "
value1=5;value2=7
subtraction=$(
echo $value1-$value2 |bc )
echo
"$value1 - $value2 = $subtraction "
subtraction=$(
echo $value2-$value1 |bc )
echo
"$value2 - $value1 = $subtraction "
value1=5;value2=7
division=$(
echo $value1/$value2 |bc )
echo
"$value1 / $value2 = $division "
division=$(
echo $value2/$value1 |bc )
echo
"$value2 / $value1 = $division "
value1=5;value2=7
multiplication=$(
echo $value1*$value2 |bc )
echo
"$value1 * $value2 = $multiplication "
value1=5;value2=7
modulus=$(
echo $value1%$value2 |bc )
echo
"$value1 % $value2 = $modulus "
modulus=$(
echo $value2%$value1 |bc )
echo
"$value2 % $value1 = $modulus "
References :- http://www.softpanorama.org/Scripting/Shellorama/arithmetic_expressions.shtml
No comments:
Post a Comment