diff --git a/build-project.sh b/build-project.sh
index e044018..420b964 100755
--- a/build-project.sh
+++ b/build-project.sh
@@ -1,5 +1,6 @@
+clear
 ceedling test:all
 cd src/
-gcc main.c -o  main
+gcc main.c mainMenu.c -o main
 ./main
 rm main
diff --git a/src/main.c b/src/main.c
index 2e0147f..3f845e6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,7 +1,6 @@
 #include <stdio.h>
 
-int main()
-{
-
-	return 0;
-}	
+int main() {
+    
+    return 0;
+}
diff --git a/src/mainMenu.c b/src/mainMenu.c
new file mode 100644
index 0000000..54d20ad
--- /dev/null
+++ b/src/mainMenu.c
@@ -0,0 +1,42 @@
+#include"mainMenu.h"
+
+
+bool agePermission(int age){
+
+    if(age >= 18)
+    {
+
+       return true;
+
+    }
+
+    else
+    {
+
+       return false;
+
+    }
+
+}
+
+bool checkIfInteger(char* input){
+
+    char *end_pointer;
+
+    strtol(input, &end_pointer, 10);
+
+    if (end_pointer == input || *end_pointer != '\0')
+    {
+
+        return false;
+
+    }
+
+    else
+    {
+
+        return true;
+
+    }
+}
+
diff --git a/src/mainMenu.h b/src/mainMenu.h
new file mode 100644
index 0000000..61192be
--- /dev/null
+++ b/src/mainMenu.h
@@ -0,0 +1,13 @@
+#ifndef MAINMENU_H_
+#define MAINMENU_H_
+
+#include<stdio.h>
+#include<stdlib.h>
+#include<stdbool.h>
+#include<string.h>
+
+bool agePermission(int age);
+bool checkIfInteger(char* userInput);
+
+#endif
+
diff --git a/tests/test_StringManipulation.c b/tests/test_StringManipulation.c
index accd414..ecae147 100644
--- a/tests/test_StringManipulation.c
+++ b/tests/test_StringManipulation.c
@@ -75,7 +75,7 @@ void test_generateCheckString()
 	for(int i=0;i<20;++i){
 		random_numbers_strings[i] = strcat(random_numbers_strings[i],"=");
 		result_3[i] = strcat(random_numbers_strings[i],strings_3[i]);
-		printf("%s\n",result_3[i]);
+		//printf("%s\n",result_3[i]);
 	}
 	for(int i=0;i<20;++i){
 		TEST_ASSERT_EQUAL_STRING(result_3[i],generateCheckString(random_numbers[i],strings_3[i]));
diff --git a/tests/test_mainMenu.c b/tests/test_mainMenu.c
new file mode 100644
index 0000000..515237d
--- /dev/null
+++ b/tests/test_mainMenu.c
@@ -0,0 +1,143 @@
+#ifdef TEST
+
+#include "unity.h"
+
+#include "mainMenu.h"
+
+void setUp(void)
+{
+}
+
+void tearDown(void)
+{
+}
+void test_agePermissionValidAge(void)
+{   
+    //Test case : 0
+
+    //Arrange
+    
+    int validAge[83];
+    
+    bool validAgeResult[83];
+
+    int j=0;
+
+    for(int i =18;i<101;i++){
+
+        validAge[j]= i;
+	j++;
+    }    
+     
+    //Act 
+
+    for(int i=0;i<83;i++){
+    
+        validAgeResult[i] = agePermission(validAge[i]);
+    }
+    
+    //Assert
+
+    for(int i=0;i<83;i++){
+        
+        TEST_ASSERT_TRUE(validAgeResult[i]);	    
+	    
+    }
+
+}
+
+void test_agePermissionInvalidAge(void)
+{
+
+    //Test case : 1
+	    
+    //Arrange
+	    
+    int invalidAge[117];
+	    
+    bool invalidAgeResult[117];
+	    
+    int j=0;
+	    
+    for(int i =-100;i<18;i++){
+	    
+        invalidAge[j]= i;
+        j++;
+    }
+	    
+    //Act
+	    
+    for(int i=0;i<117;i++){
+    
+        invalidAgeResult[i] = agePermission(invalidAge[i]);
+
+    }
+	    
+    //Assert
+	    
+    for(int i=0;i<117;i++){
+    
+        TEST_ASSERT_FALSE(invalidAgeResult[i]);
+	    
+    }
+	    
+}
+
+void test_IsInteger(void)
+{
+    
+    //Arrange
+    
+    char* inputIsInteger[] = {"-10000000","-2000000","-354698","-66667","-7878","-987","-64","-5","0","1","2","10","201","333","4321","56974","698751","7878989","88954621" };
+
+    bool inputIsIntegerResult[19];
+
+    //Act
+    
+    for(int i=0;i<19;i++)
+    {
+
+        inputIsIntegerResult[i] = checkIfInteger(inputIsInteger[i]);
+    
+    }
+
+    //Assert
+
+    for(int i=0;i<19;i++)
+    {
+
+	TEST_ASSERT_TRUE(inputIsIntegerResult[i]);
+
+    }
+
+}
+
+void test_IsNotInteger(void)
+{
+
+    //Arrange
+	    
+    char* inputIsNotInteger[] = {"0.15","3.141592653589793238","5.3254f","-6.264","-7878.3261","foo","Bar","FIZZ","buzZ","joHN","jAnE","foo-bar","3,15","2k13",""," ","-","+","/*-+.,/=" };
+	    
+    bool inputIsNotIntegerResult[19];
+	    
+    //Act
+	    
+    for(int i=0;i<19;i++)
+    {
+   
+        inputIsNotIntegerResult[i] = checkIfInteger(inputIsNotInteger[i]);
+	    
+    }
+	    
+    //Assert
+	    
+    for(int i=0;i<19;i++)
+    {
+	    
+        TEST_ASSERT_FALSE(inputIsNotIntegerResult[i]);
+	    
+    }
+	    
+}
+#endif // TEST