how to declare variable in bash script code example

Example 1: definition varibale in bash

#create variable
fullname='Restu Wahyu Saputra'
echo $fullname

Example 2: bash create variable

#create a variable to store name
name="Lance Armah"

Example 3: print variable in bash

#!/bin/bash  
echo  
echo "When single quote is used with string:"  
invitation='Welcome to javatpoint'  
echo $invitation  
echo  
echo "When double quote is used with string:"  
invitation="Welcome to javatpoint"  
echo $invitation  
echo  
echo "When variable is used with double quote:"  
Remark="Hello User!, $invitation"  
echo $Remark  
echo  
echo "When variable is used with single quote:"  
Remark='Hello User!, $invitation'  
echo $Remark  
echo