fix if else statement in checking items in a list

05_Day_Arrays/05_day_arrays.md

@@ -390,22 +390,24 @@ Check an element if it exist in an array.
 const fruits = ['banana', 'orange', 'mango', 'lemon']
 let index = fruits.indexOf('banana')  // 0
 
-if(index != -1){
+if(index === -1) {
    console.log('This fruit does exist in the array')  
 } else {
-    console.log('This fruit does not exist in the array')
+    console.log('This fruit exists in the array')
 }
-// This fruit does exist in the array
+// This fruit exists in the array
 
 // we can use also ternary here
-index != -1 ? console.log('This fruit does exist in the array'): console.log('This fruit does not exist in the array')
+index === -1 
+? console.log('This fruit does exist in the array') 
+: console.log('This fruit exists in the array')
 
 // let us check if a avocado exist in the array
 let indexOfAvocado = fruits.indexOf('avocado')  // -1, if the element not found index is -1
-if(indexOfAvocado!= -1){
+if(indexOfAvocado === -1) {
    console.log('This fruit does exist in the array')  
 } else {
-    console.log('This fruit does not exist in the array')
+    console.log('This fruit exists in the array')
 }
 // This fruit does not exist in the array
 ```