diff --git a/include/sv.h b/include/sv.h
index 1b14d3f..7c7056a 100644
--- a/include/sv.h
+++ b/include/sv.h
@@ -2,6 +2,7 @@
 #define SV_INCLUDED
 
 #include <stddef.h>
+#
 // macros
 #define SV(s) sv_str(s)
 #define SV_NULL sv_strn(NULL, 0)
@@ -21,5 +22,6 @@ SV sv_strn(const char *s, size_t len);
 SV sv_trim(SV s);
 SV sv_trim_left(SV s);
 SV sv_trim_right(SV s);
+int sv_cmp(const SV s1, const SV s2);
 
 #endif
diff --git a/src/sv.c b/src/sv.c
index 0040629..5c92636 100644
--- a/src/sv.c
+++ b/src/sv.c
@@ -27,3 +27,17 @@ SV sv_trim_right(SV s){
     while (s.len > 0 && is_space((int) *(s.buf + s.len - 1))) s.len--;
     return s;
 }
+int sv_cmp(const SV s1, const SV s2){
+    size_t i = 0;
+    while (i < s1.len && i < s2.len) {
+        int c1 = s1.buf[i];
+        int c2 = s2.buf[i];
+        if (c1 < c2) return 0;
+        if (c1 > c2) return 1;
+        i++;
+    }
+    if (i < s1.len) return 1;
+    if (i < s2.len) return 0;
+    return 0;
+}
+
diff --git a/tests/06_sv_cmp.c b/tests/06_sv_cmp.c
new file mode 100644
index 0000000..67c3931
--- /dev/null
+++ b/tests/06_sv_cmp.c
@@ -0,0 +1,16 @@
+#define DEBUG
+#include "../include/sv.h"
+#include "../include/except.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(void){
+    const char *s = "Hello World";
+    const char *s1 = "Hello World";
+    SV sv = sv_strn(s,strlen(s));
+    SV sv1 = sv_strn(s1,strlen(s1));
+    ASSERTED(sv_cmp(sv,sv1) == 0);
+    
+    return EXIT_SUCCESS;
+}