diff --git a/run.sh b/run.sh
index 89c7907..4339229 100755
--- a/run.sh
+++ b/run.sh
@@ -1,165 +1,254 @@
-
-echo "*------- assembly (nasm) ---------*"
-nasm --version
-
-cd ./src
-nasm -f elf64 ./prime.asm
-ld -s -o prime prime.o
-cd ..
-
-sleep 5 # cpu cool down
-./src/prime
-
-rm ./src/prime.o
-rm ./src/prime
-
-echo "*---- c native (opt-level=3) -----*"
-gcc --version | head -n 1
-gcc ./src/prime.c -o prime -lm -g -O3
-
-sleep 5 # cpu cool down
-
-./prime
-rm ./prime
-echo ""
-
-
-
-echo "*--- c++ native (opt-level=3) ----*"
-g++ --version | head -n 1
-g++ ./src/prime.cpp -o prime -g -O3
-
-sleep 5 # cpu cool down
-
-./prime
-rm ./prime
-echo ""
-
-
-
-echo "*--- rust native (opt-level=3) ---*"
-rustc --version
-rustc -C opt-level=3 -C target-cpu=native -C codegen-units=1 -C lto ./src/prime.rs
-
-sleep 5 # cool down cpu
-
-./prime
-rm ./prime
-echo ""
-
-
-echo "*-------------- go ---------------*"
-go version
-go build -ldflags "-s -w" ./src/prime.go
-
-sleep 5 # cpu cool down
-
-./prime
-rm ./prime
-echo ""
-echo ""
-
-
-
-echo "*-------- java (open-jdk) --------*"
-javac --version
-javac ./src/Prime.java
-
-sleep 5 # cpu cool down
-
-cd src
-java Prime
-rm ./Prime.class
-cd ..
-echo ""
-
-
-
-echo "*------------ nodejs -------------*"
-node --version
-
-sleep 5 # cool down cpu
-
-node ./src/prime.js
-echo ""
-
-
-echo "*------------ c# Mono ------------*"
-mcs --version
-mcs ./src/prime.cs
-
-sleep 5 # cpu cool down
-
-mono ./src/prime.exe
-rm ./src/prime.exe
-echo ""
-
-
-
-echo "*---------- dart native ----------*"
-dart --version
-dart compile exe ./src/prime.dart
-
-sleep 5 # cpu cool down
-
-./src/prime.exe
-rm ./src/prime.exe
-echo ""
-
-
-
-echo "*--------- python codon ----------*"
-codon --version
-codon build -release -exe ./src/prime.py
-
-sleep 5 # cpu cool down
-
-./src/prime
-rm ./src/prime
-echo ""
-
-
-
-echo "*------------ pascal -------------*"
-fpc ./src/prime.pas
-
-sleep 5 # cpu cool down
-
-./src/prime
-
-rm ./src/prime.o
-rm ./src/prime
-echo ""
-
-
-echo "*------------ python -------------*"
-python3 --version
-
-sleep 5 # cpu cool down
-
-python3 ./src/prime.py
-echo ""
-
-
-echo "*------------ Php -------------*"
-
-sleep 5 # cpu cool down
-
-php ./src/prime.php
-echo ""
-
-
-echo "*------------ R -------------*"
-
-sleep 5 # cpu cool down
-
-Rscript ./src/prime.R
-echo ""
-
-echo "*-------------- erlang ---------------*"
-erl -eval 'erlang:display(erlang:system_info(otp_release)), halt().' -noshell
-erlc -o src ./src/prime.erl
-erl -pa src -noshell -s prime main -s init stop
-
-rm ./src/prime.beam
-echo ""
+#!/bin/bash
+
+function run_assembly {
+    echo "*------- assembly (nasm) ---------*"
+    nasm --version
+
+    cd ./src
+    nasm -f elf64 ./prime.asm
+    ld -s -o prime prime.o
+    cd ..
+
+    sleep 5 # cpu cool down
+    ./src/prime
+
+    # check if file exists before attempting to remove it
+    [ -f "./src/prime.o" ] && rm ./src/prime.o
+    [ -f "./src/prime" ] && rm ./src/prime
+}
+
+function run_c_native {
+    echo "*---- c native (opt-level=3) -----*"
+    gcc --version | head -n 1
+    gcc ./src/prime.c -o prime -lm -g -O3
+
+    sleep 5 # cpu cool down
+
+    ./prime
+    # check if file exists before attempting to remove it
+    [ -f "./prime" ] && rm ./prime
+    echo ""
+}
+
+function run_cpp_native {
+    echo "*--- c++ native (opt-level=3) ----*"
+    g++ --version | head -n 1
+    g++ ./src/prime.cpp -o prime -g -O3
+
+    sleep 5 # cpu cool down
+
+    ./prime
+    # check if file exists before attempting to remove it
+    [ -f "./prime" ] && rm ./prime
+    echo ""
+}
+
+function run_rust_native {
+    echo "*--- rust native (opt-level=3) ---*"
+    rustc --version
+    rustc -C opt-level=3 -C target-cpu=native -C codegen-units=1 -C lto ./src/prime.rs
+
+    sleep 5 # cool down cpu
+
+    ./prime
+    # check if file exists before attempting to remove it
+    [ -f "./prime" ] && rm ./prime
+    echo ""
+}
+
+function run_go {
+    echo "*-------------- go ---------------*"
+    go version
+    go build -ldflags "-s -w" ./src/prime.go
+
+    sleep 5 # cpu cool down
+
+    ./prime
+    # check if file exists before attempting to remove it
+    [ -f "./prime" ] && rm ./prime
+    echo ""
+    echo ""
+}
+
+function run_java {
+    echo "*-------- java (open-jdk) --------*"
+    javac --version
+    javac ./src/Prime.java
+
+    sleep 5 # cpu cool down
+
+    cd src
+    java Prime
+    # check if file exists before attempting to remove it
+    [ -f "./Prime.class" ] && rm ./Prime.class
+    cd ..
+    echo ""
+}
+
+function run_nodejs {
+    echo "*------------ nodejs -------------*"
+    node --version
+
+    sleep 5 # cool down cpu
+
+    node ./src/prime.js
+    echo ""
+}
+
+function run_csharp_mono {
+    echo "*------------ c# Mono ------------*"
+    mcs --version
+    mcs ./src/prime.cs
+
+    sleep 5 # cpu cool down
+
+    mono ./src/prime.exe
+    # check if file exists before attempting to remove it
+    [ -f "./src/prime.exe" ] && rm ./src/prime.exe
+    echo ""
+}
+
+function run_dart_native {
+    echo "*---------- dart native ----------*"
+    dart --version
+    dart compile exe ./src/prime.dart
+
+    sleep 5 # cpu cool down
+
+    ./src/prime.exe
+    # check if file exists before attempting to remove it
+    [ -f "./src/prime.exe" ] && rm ./src/prime.exe
+    echo ""
+}
+
+function run_python_codon {
+    echo "*--------- python codon ----------*"
+    codon --version
+    codon build -release -exe ./src/prime.py
+
+    sleep 5 # cpu cool down
+
+    ./src/prime
+    # check if file exists before attempting to remove it
+    [ -f "./src/prime" ] && rm ./src/prime
+    echo ""
+}
+
+function run_pascal {
+    echo "*------------ pascal -------------*"
+    fpc ./src/prime.pas
+
+    sleep 5 # cpu cool down
+
+    ./src/prime
+    # check if file exists before attempting to remove it
+    [ -f "./src/prime.o" ] && rm ./src/prime.o
+    [ -f "./src/prime" ] && rm ./src/prime
+    echo ""
+}
+
+function run_python {
+    echo "*------------ python -------------*"
+    python3 --version
+
+    sleep 5 # cpu cool down
+
+    python3 --version
+    sleep 5 # cpu cool down
+    python3 ./src/prime.py
+    # check if file exists before attempting to remove it
+    [ -f "./src/prime.py" ] && rm ./src/prime.py
+    echo ""
+}
+
+function run_php {
+    echo "*------------ Php -------------*"
+
+    sleep 5 # cpu cool down
+
+    php ./src/prime.php
+    # check if file exists before attempting to remove it
+    [ -f "./src/prime.php" ] && rm ./src/prime.php
+    echo ""
+}
+
+function run_r {
+    echo "*------------ R -------------*"
+
+    sleep 5 # cpu cool down
+
+    Rscript ./src/prime.R
+    # check if file exists before attempting to remove it
+    [ -f "./src/prime.R" ] && rm ./src/prime.R
+    echo ""
+}
+
+function run_erlang {
+    echo "*-------------- erlang ---------------*"
+    erl -eval 'erlang:display(erlang:system_info(otp_release)), halt().' -noshell
+    erlc -o src ./src/prime.erl
+    erl -pa src -noshell -s prime main -s init stop
+
+    # check if file exists before attempting to remove it
+    [ -f "./src/prime.beam" ] && rm ./src/prime.beam
+    echo ""
+}
+#!/bin/bash
+
+# Define an associative array to map language names to function names
+declare -A langs=(
+    ["assembly"]="run_assembly"
+    ["c"]="run_c_native"
+    ["cpp"]="run_cpp_native"
+    ["rust"]="run_rust_native"
+    ["go"]="run_go"
+    ["java"]="run_java"
+    ["nodejs"]="run_nodejs"
+    ["csharp_mono"]="run_csharp_mono"
+    ["dart"]="run_dart_native"
+    ["python_codon"]="run_python_codon"
+    ["pascal"]="run_pascal"
+    ["python"]="run_python"
+    ["php"]="run_php"
+    ["r"]="run_r"
+    ["erlang"]="run_erlang"
+)
+
+# Define a function to display the help message
+function display_help {
+    echo "Usage: $0 [LANGUAGE]"
+    echo ""
+    echo "Run code in various programming languages."
+    echo ""
+    echo "If no argument is provided, the script will run code in all supported"
+    echo "languages. Otherwise, provide a language name to run the corresponding"
+    echo "code. Supported languages are:"
+    echo ""
+    for lang in "${!langs[@]}"; do
+        echo "- $lang"
+    done
+    echo ""
+    echo "Examples:"
+    echo "  # Run code in all supported languages"
+    echo "  $0"
+    echo ""
+    echo "  # Run C++ code"
+    echo "  $0 cpp"
+}
+
+if [ $# -eq 0 ]; then
+    # Loop through all languages and call their corresponding functions
+    for lang in "${!langs[@]}"; do
+        ${langs["$lang"]}
+    done
+elif [ "$1" == "--help" ] || [ "$1" == "-h" ]; then
+    # Display the help message if requested by the user
+    display_help
+else
+    # Check if the input argument is a valid language name and call its corresponding function
+    if [[ ${langs[$1]+_} ]]; then
+        ${langs[$1]}
+    else
+        echo "Invalid choice"
+    fi
+fi