String splicing method in shell

#!/bin/bash

name="Shell"
url="http://c.biancheng.net/shell/"

str1=$name$url  # No spaces in between 
str2="$name $url"  # If surrounded by double quotes , Then there can be a space in the middle 
str3=$name": "$url  # Other strings can appear in the middle 
str4="$name: $url"  # It's OK to write like this 
str5="${name}Script: ${url}index.html"  # At this time, you need to add braces to the variable name 

echo $str1
echo $str2
echo $str3
echo $str4
echo $str5

Running results ：

Shellhttp://c.biancheng.net/shell/
Shell http://c.biancheng.net/shell/
Shell: http://c.biancheng.net/shell/
Shell: http://c.biancheng.net/shell/
ShellScript: http://c.biancheng.net/shell/index.html