diff --git a/src/parser/ast.rs b/src/parser/ast.rs
index af4f8b8..7fd5c76 100644
--- a/src/parser/ast.rs
+++ b/src/parser/ast.rs
@@ -18,6 +18,13 @@ pub enum BinaryOp {
     Minus,
     Multiply,
     Divide,
+    Modulo,
+    Equal,
+    NotEqual,
+    LessThan,
+    GreaterThan,
+    LessThanOrEqual,
+    GreaterThanOrEqual,
 }
 
 #[derive(Debug, Clone, Serialize)]
diff --git a/src/parser/grammar.pest b/src/parser/grammar.pest
index 08824db..7094766 100644
--- a/src/parser/grammar.pest
+++ b/src/parser/grammar.pest
@@ -105,7 +105,7 @@ field_px  = { "." ~ identifier }
 call_px   = { "(" ~ (expr ~ ("," ~ expr)*)? ~ ")" }
 index_px  = { "[" ~ expr ~ "]" }
 binary_px = { bin_op ~ expr }
-bin_op = { "+" | "-" | "*" | "/" | "%" }
+bin_op    = { "+" | "-" | "*" | "/" | "%" | "==" | "!=" | "<" | ">" | "<=" | ">=" }
 
 expr = {
     primary ~ postfix*
diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index 6b14585..d98087d 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -341,6 +341,14 @@ impl Postfix {
                     "-" => BinaryOp::Minus,
                     "*" => BinaryOp::Multiply,
                     "/" => BinaryOp::Divide,
+                    "%" => BinaryOp::Modulo,
+                    "==" => BinaryOp::Equal,
+                    "!=" => BinaryOp::NotEqual,
+                    "<" => BinaryOp::LessThan,
+                    ">" => BinaryOp::GreaterThan,
+                    "<=" => BinaryOp::LessThanOrEqual,
+                    ">=" => BinaryOp::GreaterThanOrEqual,
+
                     _ => {
                         unimplemented!("Binary operator not implemented yet: {}", op_pair.as_str())
                     }
diff --git a/test/src/main.ms b/test/src/main.ms
index 2e358b8..755f17d 100644
--- a/test/src/main.ms
+++ b/test/src/main.ms
@@ -1,3 +1,17 @@
 function add(a: int, b: int): int {
-    itm.a + itm.b();
+    let sum = 0;
+
+    for (let i = 0; i < 10; i = i + 1) {
+        if (i == 5) {
+            continue;
+        }
+
+        sum = sum + i;
+    }
+
+    if (sum > 20) {
+        return sum;
+    } else {
+        return 0;
+    }
 }