Make operations on variable
-3
a = 10
How to make this without making a expr command ?
--> b = $a - 20
bash
edited Jan 31 at 11:18
Twisty Impersonator
18.7k146899
asked Jan 31 at 9:41
wxiwxi
102
add a comment |
-3
a = 10
How to make this without making a expr command ?
--> b = $a - 20
bash
edited Jan 31 at 11:18
Twisty Impersonator
18.7k146899
asked Jan 31 at 9:41
wxiwxi
102
add a comment |
-3
-3
-3
a = 10
How to make this without making a expr command ?
--> b = $a - 20
bash
edited Jan 31 at 11:18
Twisty Impersonator
18.7k146899
asked Jan 31 at 9:41
wxiwxi
102
a = 10
How to make this without making a expr command ?
--> b = $a - 20
bash
bash
edited Jan 31 at 11:18
Twisty Impersonator
18.7k146899
asked Jan 31 at 9:41
wxiwxi
102
edited Jan 31 at 11:18
Twisty Impersonator
18.7k146899
asked Jan 31 at 9:41
wxiwxi
102
edited Jan 31 at 11:18
Twisty Impersonator
18.7k146899
edited Jan 31 at 11:18
Twisty Impersonator
18.7k146899
edited Jan 31 at 11:18
Twisty Impersonator
18.7k146899
18.7k146899
asked Jan 31 at 9:41
wxiwxi
102
asked Jan 31 at 9:41
wxiwxi
102
asked Jan 31 at 9:41
wxiwxi
102
102
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
0
Use $(( ))
Like b=$(($a-20))
You welcome
answered Jan 31 at 9:47
wxiwxi
102
What are we looking at, and what should a reader do with it and why?
– fixer1234
Jan 31 at 10:30
We're looking "to make this without making aexprcommand " And for doing "-->b = $a - 20" a reader should do "Likeb=$(($a-20))" because it's the way "to make this without making aexprcommand "
– wxi
Feb 1 at 8:08
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
Use $(( ))
Like b=$(($a-20))
You welcome
answered Jan 31 at 9:47
wxiwxi
102
What are we looking at, and what should a reader do with it and why?
– fixer1234
Jan 31 at 10:30
We're looking "to make this without making aexprcommand " And for doing "-->b = $a - 20" a reader should do "Likeb=$(($a-20))" because it's the way "to make this without making aexprcommand "
– wxi
Feb 1 at 8:08
add a comment |
0
Use $(( ))
Like b=$(($a-20))
You welcome
answered Jan 31 at 9:47
wxiwxi
102
What are we looking at, and what should a reader do with it and why?
– fixer1234
Jan 31 at 10:30
We're looking "to make this without making aexprcommand " And for doing "-->b = $a - 20" a reader should do "Likeb=$(($a-20))" because it's the way "to make this without making aexprcommand "
– wxi
Feb 1 at 8:08
add a comment |
0
0
0
Use $(( ))
Like b=$(($a-20))
You welcome
answered Jan 31 at 9:47
wxiwxi
102
Use $(( ))
Like b=$(($a-20))
You welcome
answered Jan 31 at 9:47
wxiwxi
102
answered Jan 31 at 9:47
wxiwxi
102
answered Jan 31 at 9:47
wxiwxi
102
answered Jan 31 at 9:47
wxiwxi
102
102
What are we looking at, and what should a reader do with it and why?
– fixer1234
Jan 31 at 10:30
We're looking "to make this without making aexprcommand " And for doing "-->b = $a - 20" a reader should do "Likeb=$(($a-20))" because it's the way "to make this without making aexprcommand "
– wxi
Feb 1 at 8:08
add a comment |
What are we looking at, and what should a reader do with it and why?
– fixer1234
Jan 31 at 10:30
We're looking "to make this without making aexprcommand " And for doing "-->b = $a - 20" a reader should do "Likeb=$(($a-20))" because it's the way "to make this without making aexprcommand "
– wxi
Feb 1 at 8:08
What are we looking at, and what should a reader do with it and why?
– fixer1234
Jan 31 at 10:30
What are we looking at, and what should a reader do with it and why?
– fixer1234
Jan 31 at 10:30
We're looking "to make this without making a
expr command " And for doing "--> b = $a - 20" a reader should do "Like b=$(($a-20))" because it's the way "to make this without making a expr command "– wxi
Feb 1 at 8:08
We're looking "to make this without making a
expr command " And for doing "--> b = $a - 20" a reader should do "Like b=$(($a-20))" because it's the way "to make this without making a expr command "– wxi
Feb 1 at 8:08
add a comment |
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