let(1) User Commands let(1)NAME
let - shell built-in function to evaluate one or more arithmetic expressions
SYNOPSIS
ksh
let arg...
ksh93
let [expr...]
DESCRIPTION
ksh
Each arg is a separate arithmetic expression to be evaluated.
ksh93
let evaluates each expr in the current shell environment as an arithmetic expression using ANSI C syntax. Variables names are shell vari-
ables and they are recursively evaluated as arithmetic expressions to get numerical values. let has been made obsolete by the ((...)) syn-
tax of ksh93(1) which does not require quoting of the operators to pass them as command arguments.
EXIT STATUS
ksh
ksh returns the following exit values:
0 The value of the last expression is non-zero.
1 The value of the last expression is zero.
ksh93
ksh93 returns the following exit values:
0 The last expr evaluates to a non-zero value.
>0 The last expr evaluates to 0 or an error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO ksh(1), ksh93(1), set(1), typeset(1), attributes(5)SunOS 5.11 2 Nov 2007 let(1)
Check Out this Related Man Page
let(1) User Commands let(1)NAME
let - shell built-in function to evaluate one or more arithmetic expressions
SYNOPSIS
ksh
let arg...
DESCRIPTION
ksh
Each arg is a separate "arithmetic expression" to be evaluated.
EXIT STATUS
The following exit values are returned:
0 The value of the last expression is non-zero.
1 The value of the last expression is zero.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO ksh(1), set(1), typeset(1), attributes(5)SunOS 5.10 15 Apr 1994 let(1)
All,
I need l help in writing a script;
I have a file with header on the first row data rows next and the last row in the file contains the record count of the data records only. I need to remove the last and first line and check to see that the data rows match the count on the last line. ... (61 Replies)
this is the content of the file:
i want to remove both the line starting with "=" and "(" but i can only remove one at a time..so how do I go about removing both of them? (15 Replies)
I have contents like
423562143124/53125351276
sdgas/347236
sjhdk;ls'ald/y62783612763
I need a command that would make the string before / and after / as separate output as (A should contain 423562143124 )and B should
contain 53125351276).
I tried but in vain.
Please help. (19 Replies)
I would like to add 4.7 and 1.2. However I am unable to do this with expr.
Any simple ideas (even using something other than expr)?
Example:
me> expr 4 + 1
5
me> expr 4.7 + 1.2
expr: 0402-046 A specified operator requires numeric parameters. (18 Replies)
Using AIX 5.3 and /user/bin/ksh.
Anyone have a quick way to convert the string date
Nov 9 11:35:28 2009 to 200911091135
I know I could create a table of months and find the month number by searching the list, but I was hoping there was some handy little known command to do this... (15 Replies)
I am running AIX 5.3 using the Korn Shell. I am reading file names from a file, as an example:
E0801260
E0824349
E0925345
EMPMSTR
statement "num=$(expr substr "$DDNAME" 4 2)
extracts the numeric values fine. But when I het the last entry, it returns num=MS, but I get an error... (19 Replies)
i have a ksh code that needs to be written in AWK. can someone please help me here? :(
if }" | grep -c "$2") -gt 0 ] ; then
print - "found $2 in array ignore"
else
print - "did not find $2 in array ignore"
fi
ignore=4ty56r
ignore=er45ty
.
.
.
ignore=frhtg2 (27 Replies)
I have the following ksh code and I am passing
f="npt06-sr40-syn-dc0p02-32x24drw.mis"
For some reason, it's going to the else statement instead of setting
optfdrw=1
smptag=$(print -R $f | awk '/smp/')
drwtag=$(print -R $f | awk '/drw/')
if && ; then # drw tag... (15 Replies)
Hi,
I have a separate file with a ksh function in it. When I try to run it, I get an error about permissions:
user@~/scripts/functions$ ksh f_fill_testfunc
ksh: f_fill_testfunc: cannot open
user@~/scripts/functions$ ls -l batch_functions/f_fill_testfunc
-rwxr-xr-x 1 user user 1105 Aug... (18 Replies)
Hi, I have an ksh array(ARR). the elements to the array are file names. i need to go to each file in the array and manipulate the records.
for name in ${files}; do ---this loop is for all the file names in the array
for i in $(wc -l < $name); do --this loop is for all the records in... (20 Replies)
This is for the big guns...
I have been modifying AudioScope.sh to bring it inline with more current practices.
I hit a bug which IS not present in the original code but was after modification.
Shell check first:-
#!/bin/sh
txt="1234567890"
echo "$(( $txt ))"
echo "$(( ${#txt} - 1 ))"
echo... (17 Replies)
Hi Folks -
I'm looking for the best way to to increment fiscal weeks - allow me to explain.
At my one client, 10/01/17 was the beginning if year fiscal year 2018.
Each week, I need to manage a unique set of variable that are updated in my application - they are called substitution variables.... (31 Replies)
Hi folks,
I have a script where i am trying to calc the difference between two epoch dates and then have a condition based on the resultant value.
When I run the script it keeps complaining;
expr: syntax error
./testdiff.sh: line 11: syntax error in conditional expression
./testdiff.sh:... (25 Replies)
Well i set myself a challenge to have an FFT function using nothing but ksh93 and awk.
It took some serious jiggery pokery and concentration with all the brackets and '$' characters but here is the result. It is RADIX 2 only, but hey, show me another UNIX shell script that does it. It IS SLOW but... (17 Replies)
Hi guys...
I am working on limited basic set of maths routines for ksh93 that can be sourced as . ./ksh_math.sh and I am gobsmacked by its capabilities.
Although some big guns may already know this, I didn't, and ksh93 is easily able to do floating point numbers to floating point powers and... (16 Replies)