I solved the js-fundamental exercise 2

exercise.js

@@ -1,2 +1,56 @@
 // Good Luck! You got this 💪🏾
 // Write your code here.
+
+
+// Functions
+
+function  describeCountry(country,population ,capitalCity){
+    console.log(country +' has '+population + ' million people and its captial city is '+ capitalCity );
+}
+describeCountry('somalind','3.5','Hargeisa');
+describeCountry('Bangladesh','168','Dhaka');
+describeCountry('Turkey','86','Ankara');
+
+function percentageOfWorld1(country ,population){
+  let  pop_percentage= (population / 7900) *100 ;
+console.log( country+" has "+ population+ " million people, so it's about " + pop_percentage + " of the world population");
+}
+const som_world_pop = percentageOfWorld1("Somalia",16);
+const turkey_world_pop = percentageOfWorld1("Turkey",86);
+const china_world_pop = percentageOfWorld1("China",1441);
+
+
+// Introduction to arrays
+
+ let population = [86000000,168000000 ,16000000];
+ let neighbours =[ "kenya","Djibouti" ,"Ethiopia"]
+
+ if(neighbours.length ==4){
+    console.log(true)
+ }else{
+    console.log(false)
+ }
+
+ //Iteration: for loops
+
+ for(let i=0;i<=2;i++){
+    console.log(neighbours[i])
+ }
+
+ for(let i=2 ;i>=0 ;i--){
+    console.log(neighbours[i])
+ }
+
+ //Iteration: while loop
+
+ let i = 0
+ while(i<2){
+  console.log(neighbours[i])
+  i++
+}
+
+let j = 3
+while(j>=0){
+ console.log(neighbours[j])
+ j--
+}