Example: Math and Variables in Bash
#!/bin/bash
# A sample Bash script by John Smith
firstname=John
lastname=Smith
address='100 Main Street'
echo $firstname $lastname
echo $address
Output:
John Smith
100 Main Street
Example: Math and Variables in Bash
#!/bin/bash
# A sample Bash script by John Smith
echo "3*2" | bc
declare -i total # needed for next line to work; declare n integer
total=5-3
echo $total
x=10
y=2
echo $x+$y | bc
awk "BEGIN {printf \"%.2f\n\", 100/3}"
awk "BEGIN {printf \"%.2f\n\", $x}"
Output:
6
2
12
33.33
10.00
Example: Math and Variables in Bash
#!/bin/bash
# A sample Bash script by John Smith
let f=5
echo $f
let g=$f+1
echo $g
((h=2))
echo $h
((h++))
echo $h
Output:
5
6
2
3