#!/bin/bash # Write a shell program to concatenate to two String given as input and display the # resultant string along with its string length. # -------------------------------------------------------------------- # This is a free shell script under GNU GPL version 2.0 or above # Copyright (C) 2005 nixCraft project. # Feedback/comment/suggestions : http://cyberciti.biz/fb/ # ------------------------------------------------------------------------- # This script is part of nixCraft shell script collection (NSSC) # Visit http://bash.cyberciti.biz/ for more information. # ------------------------------------------------------------------------- STR1=$1 STR1=$2 OUT="$1$2" if [ $# -eq 0 ] then echo "$0 string1 string2" exit 1 fi len=$(expr length $OUT) echo "Concatenate string is - $OUT" echo "String Length is - $len"
🐧 Get the latest tutorials on SysAdmin, Linux/Unix, Open Source, and DevOps topics via:
- RSS feed or Weekly email newsletter
- 5 comments... add one ↓
Related Shell Scripts:
| Category | List of Unix and Linux commands |
|---|---|
| File Management | cat |
| Firewall | Alpine Awall • CentOS 8 • OpenSUSE • RHEL 8 • Ubuntu 16.04 • Ubuntu 18.04 • Ubuntu 20.04 |
| Network Utilities | dig • host • ip • nmap |
| OpenVPN | CentOS 7 • CentOS 8 • Debian 10 • Debian 8/9 • Ubuntu 18.04 • Ubuntu 20.04 |
| Package Manager | apk • apt |
| Processes Management | bg • chroot • cron • disown • fg • jobs • killall • kill • pidof • pstree • pwdx • time |
| Searching | grep • whereis • which |
| User Information | groups • id • lastcomm • last • lid/libuser-lid • logname • members • users • whoami • who • w |
| WireGuard VPN | Alpine • CentOS 8 • Debian 10 • Firewall • Ubuntu 20.04 |
get rid of the ` in your expr
for instance, if you wanted to get the length of s3 in len, you;d do
len= expr length $s3
echo $len
HTH
..
Why doesn’t this work?????
#!/bin/sh
echo “Enter first string:”
read s1
echo “Enter second string:”
read s2
s3=$s1$s2
len=`echo $s3 | wc -c`
len=`expr $len – 1`
echo “Concatenated string is $s3 of length $len “
concatenation is performed
but
length doesn’t calculated
to get the length of a string can I use len=`echo $str | wc -c`?????
what is length in the expression “len=$(expr length $OUT)”
did you write that function or SHELL has that function?