good quality problem solved today

Author: sagarrepogit

problem_july_23.js

@@ -0,0 +1,87 @@
+// question 18
+// create a program that will print the first 100 prime numbers
+
+
+// this is a good question where i have to basically 
+//cheack two things and that are first that i have to cheack that that number is a prime number or not
+// second thing that i have to cheak that is that is i got my 100 prime number
+
+// now the funciton for cheacking if my number is a prime number or not
+function isprime(number){
+if(number<2){
+    return false
+} for(let i=2; i<=Math.sqrt(number);i++){
+    if(number%i==0){
+        return false
+    }
+}return true
+}
+// now lets print the prime and cheack wheather i have printed the 100 or not
+function prime (nums){
+    let count=0;
+    let num=2
+    while(count<nums){
+        if(isprime(num)){
+            count++
+            console.log(num)
+        }
+        
+        num++
+    }
+}
+prime(100)
+
+//question 19
+//create a fucntion that will return in an array the first "nprimes" prime
+//  numbres greater than a particular number startAt
+// means that i need to create a function that will take two input 
+//and return the desired ouput
+
+// here in this code what i need to do is that i need to find the
+//prime number after a certain point that is it
+
+getprime(10,5)
+function getprime(nprimes, start){
+count =0
+    while(count<nprimes){
+        if(prime_hai(start)){
+            console.log(start)
+            count++
+        }
+        start++
+    }
+}
+function prime_hai(start){
+    if(start<2){return false
+    }
+    for(let i=2;i<=Math.sqrt(start);i++){
+        if(start%i==0){
+            return false
+        }
+    }return true
+}
+
+//question 20
+//rotate the an array to the left one(1) position
+ 
+// this kind of questions are very easy in the js as it can be easily be done with the help of the shift method in the js
+function shift_karna(arr){
+    let temp=arr.shift()
+    arr.push(temp)
+    return console.log(arr)
+}
+let arr=[1,2,3,4,5]
+shift_karna(arr)
+
+
+//question 21
+// rotate an array to the right by 1 position
+
+function right_kro(arr1){
+    let temp=arr1.pop()
+    arr1.unshift(temp)
+    return console.log(arr1)
+}
+let arr1=[1,2,3,4]
+right_kro(arr1)
+