diff --git a/README.md b/README.md
index bf79e80..74fdfe3 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,7 @@ Detailed documentation is available at <https://labbots.github.io/bash-utility/>
 - [Installation](#installation)
   - [Method 1 - Git Submodules](#method-1---git-submodules)
   - [Method 2 - Git Clone](#method-2---git-clone)
+  - [Method 3 - Direct Download](#method-3---direct-download)
 - [Usage](#usage)
 - [Array](#array)
   - [array::contains()](#arraycontains)
@@ -123,6 +124,7 @@ Detailed documentation is available at <https://labbots.github.io/bash-utility/>
   - [variable::is_bool()](#variableis_bool)
   - [variable::is_true()](#variableis_true)
   - [variable::is_false()](#variableis_false)
+  - [variable::is_empty_or_null()](#variableis_empty_or_null)
 - [Inspired By](#inspired-by)
 - [License](#license)
 
@@ -1843,10 +1845,6 @@ Prompt yes or no question to the user.
 - **1**:  If user responds with no.
 - **2**: Function missing arguments.
 
-#### Output on stdout
-
-- question to be prompted to the user.
-
 #### Example
 
 ```bash
@@ -1871,7 +1869,7 @@ Prompt question to the user.
 
 #### Output on stdout
 
-- question to be prompted to the user.
+- User entered answer to the question.
 
 #### Example
 
@@ -2450,6 +2448,28 @@ variable::is_false "false"
 0
 ```
 
+### variable::is_empty_or_null()
+
+Check if given variable is empty or null.
+
+#### Arguments
+
+- **$1** (mixed): Value of variable to check.
+
+#### Exit codes
+
+- **0**:  If input is empty or null.
+- **1**: If input is not empty.
+
+#### Example
+
+```bash
+test=''
+variable::is_empty_or_null $test
+#Output
+0
+```
+
 <!-- END generate_readme.sh generated SHDOC please keep comment here to allow auto update -->
 
 ## Inspired By
diff --git a/bin/generate_readme.sh b/bin/generate_readme.sh
index 972e997..5f8138d 100755
--- a/bin/generate_readme.sh
+++ b/bin/generate_readme.sh
@@ -12,6 +12,8 @@ Options:\n
   -s | --sh-dir <folderpath> - path to the bash script source folder to generate shdocs.\n
   -l | --toc-level <number> - Minimum level of header to print in Table of Contents.\n
   -d | --toc-depth <number> - Maximum depth of tree to print in Table of Contents.\n
+  -w | --webdoc - Flag to indicate generation of webdoc.\n
+  -p | --dest-dir <folderpath> - Path in which wedoc files must be generated.\n
   -h | --help - Display usage instructions.\n" "${0##*/}"
     exit 0
 }
diff --git a/src/interaction.sh b/src/interaction.sh
index 53cf180..910b60e 100644
--- a/src/interaction.sh
+++ b/src/interaction.sh
@@ -16,8 +16,6 @@
 # @exitcode 0  If user responds with yes.
 # @exitcode 1  If user responds with no.
 # @exitcode 2 Function missing arguments.
-#
-# @stdout question to be prompted to the user.
 interaction::prompt_yes_no() {
     [[ $# = 0 ]] && printf "%s: Missing arguments\n" "${FUNCNAME[0]}" && return 2
     declare def_arg response
@@ -71,7 +69,7 @@ interaction::prompt_yes_no() {
 # @exitcode 0  If user responds with answer.
 # @exitcode 2 Function missing arguments.
 #
-# @stdout question to be prompted to the user.
+# @stdout User entered answer to the question.
 interaction::prompt_response() {
     [[ $# = 0 ]] && printf "%s: Missing arguments\n" "${FUNCNAME[0]}" && return 2
 
diff --git a/src/variable.sh b/src/variable.sh
index 230553f..60b7eeb 100644
--- a/src/variable.sh
+++ b/src/variable.sh
@@ -126,3 +126,19 @@ variable::is_true() {
 variable::is_false() {
     [[ "${1}" = false || "${1}" -eq 1 ]] && return 0 || return 1
 }
+
+# @description Check if given variable is empty or null.
+#
+# @example
+#   test=''
+#   variable::is_empty_or_null $test
+#   #Output
+#   0
+#
+# @arg $1 mixed Value of variable to check.
+#
+# @exitcode 0  If input is empty or null.
+# @exitcode 1 If input is not empty.
+variable::is_empty_or_null() {
+  [[ -z "${1}" || "${1}" = "null" ]] && return 0 || return 1
+}