diff --git a/prezentace.md b/prezentace.md
index 418e911..7231cd5 100644
--- a/prezentace.md
+++ b/prezentace.md
@@ -250,7 +250,7 @@ foo.bar
 let 
   foo = {
     bar = "test"
-  }; 
+  };
 in
 foo.bar
 ```
@@ -276,7 +276,74 @@ foo.bar
 
 ---
 
+## Funkce
 
+```nix
+# Jednoduchá funkce
+let 
+ bar = eggs: eggs + 1;
+in
+ bar 3 # -> 4
+
+# Funkce s více parametry
+let 
+ bar = eggs: bacon: (eggs+1) * bacon;
+in
+bar 3 7 # -> 28
+```
+
+---
+
+```nix
+let 
+ bar = { bacon, eggs }: bacon + eggs;
+in
+ bar { bacon = 10; eggs = 15; }
+```
+
+* konfigurační soubory jsou funkce
+
+```nix
+# configuration.nix
+{inputs, pkgs}:
+{
+  environment.systemPackages = [
+    inputs.zen-browser.packages.${system}.default
+    pkgs.gcc
+  ];
+}
+```
+
+---
+
+```nix
+let 
+ bar = { bacon ? 10, eggs, ... }: bacon + eggs;
+in
+ bar { eggs = 15; bread = 30 }
+```
+
+```nix
+let 
+ bar = { bacon ? 10, ... }@arguments: 
+  bacon + arguments.eggs;
+in
+ bar { eggs = 15; bread = 30; }
+```
+
+---
+
+```nix
+ outputs = inputs @ {
+    nixpkgs,
+    home-manager,
+    zen-browser,
+    ...
+  }: {
+    nixosConfigurations = {
+      nixos = nixpkgs.lib.nixosSystem {
+...
+```
 
 ---