bash increment variable code example

Example 1: increment number bash

i=$((i+1))
((i=i+1))
let "i=i+1"

Example 2: increment variable bash

#Increment varible in bash script
((i++))
((i=i+1))
i=$((i+1))
let "i++"
let "i=i+1"

Example 3: sh increment variable

let "i=i+1"