diff --git a/lua/hacker-helper.lua b/lua/hacker-helper.lua
index 249e0a5..2e6a790 100644
--- a/lua/hacker-helper.lua
+++ b/lua/hacker-helper.lua
@@ -24,4 +24,10 @@ M.hello = function()
   return module.my_first_function(M.config.opt)
 end
 
+-- Key mappings for executing in terminal
+vim.api.nvim_set_keymap('n', '<leader>e', ':lua require("hacker-helper.module").exec_line_or_selection_in_term()<CR>',
+  { noremap = true, silent = true })
+vim.api.nvim_set_keymap('v', '<leader>e', ':lua require("hacker-helper.module").exec_line_or_selection_in_term()<CR>',
+  { noremap = true, silent = true })
+
 return M
diff --git a/lua/hacker-helper/module.lua b/lua/hacker-helper/module.lua
index 78a9962..f29c881 100644
--- a/lua/hacker-helper/module.lua
+++ b/lua/hacker-helper/module.lua
@@ -5,5 +5,73 @@ local M = {}
 M.my_first_function = function(greeting)
   return greeting
 end
+-- Initialize the toggleterm plugin if not already done
+-- require('toggleterm').setup {
+--   direction = 'vertical',
+--   size = 50,
+-- }
+
+-- Function to execute the current line or visual selection in an existing terminal
+function M.exec_line_or_selection_in_term()
+  -- Initialize the toggleterm plugin if not already done
+  local ok, toggleterm = pcall(require, 'toggleterm')
+  if ok then
+    toggleterm.setup {
+      direction = 'vertical',
+      size = 50,
+    }
+  else
+    print("toggleterm is not installed or cannot be loaded.")
+    return
+  end
+
+  local mode = vim.api.nvim_get_mode().mode
+  local lines = {}
+
+  if mode == 'v' then
+    -- Get the visually selected lines
+    local start_pos = vim.fn.getpos("'<")
+    local end_pos = vim.fn.getpos("'>")
+    lines = vim.fn.getline(start_pos[2], end_pos[2])
+  else
+    -- Get the current line
+    table.insert(lines, vim.fn.getline('.'))
+  end
+
+  -- Find the existing terminal buffer
+  local term_bufnr = nil
+  local buffers = vim.api.nvim_list_bufs()
+
+  for _, buf in ipairs(buffers) do
+    if vim.api.nvim_buf_get_option(buf, 'buftype') == 'terminal' then
+      term_bufnr = buf
+      break
+    end
+  end
+
+  if term_bufnr then
+    -- Switch to the terminal buffer
+    vim.api.nvim_set_current_buf(term_bufnr)
+
+    -- Safely check if the terminal job ID exists
+    local term_job_id = vim.b.terminal_job_id
+    if not term_job_id then
+      print("No terminal job ID found.")
+      return
+    end
+
+    -- Send the command to the terminal
+    for _, line in ipairs(lines) do
+      vim.api.nvim_chan_send(term_job_id, line .. "\n")
+    end
+
+    -- Switch back to the previous buffer
+    vim.cmd("b#")
+  else
+    print("No terminal buffer found.")
+  end
+end
+
+-- End of Function
 
 return M
diff --git a/plugin/hacker-helper.lua b/plugin/hacker-helper.lua
index 2e3cd2e..0fd747e 100644
--- a/plugin/hacker-helper.lua
+++ b/plugin/hacker-helper.lua
@@ -1 +1,6 @@
 vim.api.nvim_create_user_command("HackerHelper", require("hacker-helper").hello, {})
+-- Key mappings for executing in terminal
+vim.api.nvim_set_keymap('n', '<leader>e', ':lua require("hacker-helper.module").exec_line_or_selection_in_term()<CR>',
+  { noremap = true, silent = true })
+vim.api.nvim_set_keymap('v', '<leader>e', ':lua require("hacker-helper.module").exec_line_or_selection_in_term()<CR>',
+  { noremap = true, silent = true })