javascript-tutorial
diff --git a/1-js/02-first-steps/11-logical-operators/1-alert-null-2-undefined/task.md b/1-js/02-first-steps/11-logical-operators/1-alert-null-2-undefined/task.md
@@ -2,9 +2,9 @@ importance: 5
 
 ---
 
-# What's the result of OR?
+# Hvad er resultatet af OR?
 
-What is the code below going to output?
+Hvad vil koden nedenfor vise?
 
 ```js
 alert( null || 2 || undefined );

diff --git a/1-js/02-first-steps/11-logical-operators/2-alert-or/solution.md b/1-js/02-first-steps/11-logical-operators/2-alert-or/solution.md
@@ -1,13 +1,13 @@
-The answer: first `1`, then `2`.
+Svaret er: først `1`, så `2`.
 
 ```js run
 alert( alert(1) || 2 || alert(3) );
 ```
 
-The call to `alert` does not return a value. Or, in other words, it returns `undefined`.
+Kaldet `alert` returnerer ikke en værdi. Med andre ord returnerer det `undefined`.
 
-1. The first OR `||` evaluates its left operand `alert(1)`. That shows the first message with `1`.
-2. The `alert` returns `undefined`, so OR goes on to the second operand searching for a truthy value.
-3. The second operand `2` is truthy, so the execution is halted, `2` is returned and then shown by the outer alert.
+1. Den første OR `||` evaluerer sin venstre operand `alert(1)`. Det viser den første besked med `1`.
+2. `alert` returnerer `undefined`, så OR går videre til den anden operand for at lede efter en sandfærdig værdi.
+3. Den anden operand `2` er sandfærdig, så udførelsen stoppes, `2` returneres og vises derefter af den ydre alert.
 
-There will be no `3`, because the evaluation does not reach `alert(3)`.
+Der vil ikke være nogen `3`, fordi evalueringen ikke når `alert(3)`.
diff --git a/1-js/02-first-steps/11-logical-operators/2-alert-or/task.md b/1-js/02-first-steps/11-logical-operators/2-alert-or/task.md
@@ -2,9 +2,9 @@ importance: 3
 
 ---
 
-# What's the result of OR'ed alerts?
+# Hvad er resultatet af OR mellem alert()?
 
-What will the code below output?
+Hvad vil koden nedenfor vise?
 
 ```js
 alert( alert(1) || 2 || alert(3) );

diff --git a/1-js/02-first-steps/11-logical-operators/3-alert-1-null-2/solution.md b/1-js/02-first-steps/11-logical-operators/3-alert-1-null-2/solution.md
@@ -1,4 +1,4 @@
-The answer: `null`, because it's the first falsy value from the list.
+Svaret er: `null`, fordi det er den første falsy værdi i listen.
 
 ```js run
 alert(1 && null && 2);

diff --git a/1-js/02-first-steps/11-logical-operators/3-alert-1-null-2/task.md b/1-js/02-first-steps/11-logical-operators/3-alert-1-null-2/task.md
@@ -2,9 +2,9 @@ importance: 5
 
 ---
 
-# What is the result of AND?
+# Hvad er resultatet af AND?
 
-What is this code going to show?
+Hvad vil koden nedenfor vise?
 
 ```js
 alert( 1 && null && 2 );

diff --git a/1-js/02-first-steps/11-logical-operators/4-alert-and/solution.md b/1-js/02-first-steps/11-logical-operators/4-alert-and/solution.md
@@ -1,10 +1,10 @@
-The answer: `1`, and then `undefined`.
+Svaret er: `1`, og derefter `undefined`.
 
 ```js run
 alert( alert(1) && alert(2) );
 ```
 
-The call to `alert` returns `undefined` (it just shows a message, so there's no meaningful return).
+Kaldet til `alert` returnerer `undefined` (det viser bare en besked, så der er ingen meningsfuld returværdi).
 
-Because of that, `&&` evaluates the left operand (outputs `1`), and immediately stops, because `undefined` is a falsy value. And `&&` looks for a falsy value and returns it, so it's done.
+På grund af det evaluerer `&&` venstre operand (viser `1`), og stopper straks, fordi `undefined` er en falsy værdi. Og `&&` leder efter en falsy værdi og returnerer den, så det er færdigt.
 
diff --git a/1-js/02-first-steps/11-logical-operators/4-alert-and/task.md b/1-js/02-first-steps/11-logical-operators/4-alert-and/task.md
@@ -2,9 +2,9 @@ importance: 3
 
 ---
 
-# What is the result of AND'ed alerts?
+# Hvad er resultatet af AND mellem alert()?
 
-What will this code show?
+Hvad vil koden nedenfor vise?
 
 ```js
 alert( alert(1) && alert(2) );

diff --git a/1-js/02-first-steps/11-logical-operators/5-alert-and-or/solution.md b/1-js/02-first-steps/11-logical-operators/5-alert-and-or/solution.md
@@ -1,16 +1,16 @@
-The answer: `3`.
+Svaret er: `3`.
 
 ```js run
 alert( null || 2 && 3 || 4 );
 ```
 
-The precedence of AND `&&` is higher than `||`, so it executes first.
+Præcedensen af AND `&&` er højere end `||`, så det udføres først.
 
-The result of `2 && 3 = 3`, so the expression becomes:
+Resultatet af `2 && 3 = 3`, så udtrykket bliver:
 
 ```
 null || 3 || 4
 ```
 
-Now the result is the first truthy value: `3`.
+Nu er resultatet den første sandfærdige værdi: `3`.
 
diff --git a/1-js/02-first-steps/11-logical-operators/5-alert-and-or/task.md b/1-js/02-first-steps/11-logical-operators/5-alert-and-or/task.md
@@ -2,9 +2,9 @@ importance: 5
 
 ---
 
-# The result of OR AND OR
+# Resultatet af OR AND OR
 
-What will the result be?
+Hvad vil resultatet være?
 
 ```js
 alert( null || 2 && 3 || 4 );

diff --git a/1-js/02-first-steps/11-logical-operators/6-check-if-in-range/task.md b/1-js/02-first-steps/11-logical-operators/6-check-if-in-range/task.md
@@ -2,8 +2,8 @@ importance: 3
 
 ---
 
-# Check the range between
+# Check afstanden inden for intervallet
 
-Write an `if` condition to check that `age` is between `14` and `90` inclusively.
+Skriv en `if` betingelse for at tjekke, at `age` er mellem `14` og `90` inklusivt.
 
-"Inclusively" means that `age` can reach the edges `14` or `90`.
+"Inklusivt" betyder, at `age` kan nå kanterne `14` og `90`.
diff --git a/1-js/02-first-steps/11-logical-operators/7-check-if-out-range/solution.md b/1-js/02-first-steps/11-logical-operators/7-check-if-out-range/solution.md
@@ -1,10 +1,10 @@
-The first variant:
+Den første variant:
 
 ```js
 if (!(age >= 14 && age <= 90))
 ```
 
-The second variant:
+Den anden variant:
 
 ```js
 if (age < 14 || age > 90)

diff --git a/1-js/02-first-steps/11-logical-operators/7-check-if-out-range/task.md b/1-js/02-first-steps/11-logical-operators/7-check-if-out-range/task.md
@@ -2,8 +2,8 @@ importance: 3
 
 ---
 
-# Check the range outside
+# Check afstanden uden for intervallet
 
-Write an `if` condition to check that `age` is NOT between `14` and `90` inclusively.
+Skriv en `if` betingelse for at tjekke, at `age` IKKE er mellem `14` og `90` inklusivt.
 
-Create two variants: the first one using NOT `!`, the second one -- without it.
+Lav to varianter: den første bruger NOT `!`, den anden -- uden det.
diff --git a/1-js/02-first-steps/11-logical-operators/8-if-question/solution.md b/1-js/02-first-steps/11-logical-operators/8-if-question/solution.md
@@ -1,19 +1,19 @@
-The answer: the first and the third will execute.
+Svaret er: den første og den tredje vil blive udført.
 
-Details:
+Detaljer:
 
 ```js run
-// Runs.
+// Kører.
 // The result of -1 || 0 = -1, truthy
 if (-1 || 0) alert( 'first' );
 
-// Doesn't run
+// Kører ikke
 // -1 && 0 = 0, falsy
 if (-1 && 0) alert( 'second' );
 
-// Executes
-// Operator && has a higher precedence than ||
-// so -1 && 1 executes first, giving us the chain:
+// Kører
+// Operator && har en højere præcedens end ||
+// så -1 && 1 udføres først, hvilket giver os kæden:
 // null || -1 && 1  ->  null || 1  ->  1
 if (null || -1 && 1) alert( 'third' );
 ```

diff --git a/1-js/02-first-steps/11-logical-operators/9-check-login/ifelse_task.svg b/1-js/02-first-steps/11-logical-operators/9-check-login/ifelse_task.svg
diff --git a/1-js/02-first-steps/11-logical-operators/9-check-login/solution.md b/1-js/02-first-steps/11-logical-operators/9-check-login/solution.md
@@ -1,24 +1,24 @@
 
 
 ```js run demo
-let userName = prompt("Who's there?", '');
+let userName = prompt("Hvem er du?", '');
 
 if (userName === 'Admin') {
 
   let pass = prompt('Password?', '');
 
   if (pass === 'TheMaster') {
-    alert( 'Welcome!' );
+    alert( 'Velkommen!' );
   } else if (pass === '' || pass === null) {
-    alert( 'Canceled' );
+    alert( 'Annulleret' );
   } else {
-    alert( 'Wrong password' );
+    alert( 'Forkert password' );
   }
 
 } else if (userName === '' || userName === null) {
-  alert( 'Canceled' );
+  alert( 'Annulleret' );
 } else {
-  alert( "I don't know you" );
+  alert( "Kender dig ikke" );
 }
 ```