Questions on jumps in loop : Implementation of continue and break

Jumps in Loops

Jumps in loops are used to control the flow of loops. There are two statements used to implement jump in loops - Continue and Break. These statements are used when we need to change the flow of the loop when some specified condition is met.

Ques1. Write a program to print all odd numbers till n.

#include <iostream>

using namespace std;

int main() {

int n;

cout<<"Enter a number: ";

cin>>n;

for (int i=1; i<=n; i++) {

if (i%2==0) { // i is even

continue;

}

cout<<i<<endl;

}

return 0;

}

Ques2. Write a program to check if a given number is prime or not.

#include <iostream>

using namespace std;

int main() {

int n;

cout<<"Enter a number: "

cin>>n;

int i;

for (i=2; i<n; i++) {

if (n%i==0) { //found a factor

of n

cout<<"Not a prime"<<endl;

break;

}

if (i==n) { //loop has

completed all iterations

cout<<"Prime Number"<<endl;

}

return 0;

}

Ques3. Write a program to print all prime numbers in a given range.

#include <iostream>

using namespace std;

int main() {

int a,b;

cout<<"Enter 2 numbers: ";

cin>>a>>b;

for (int num=a; num<=b; num++) {

int i;

for (i=2; i<num; i++) {

if (num%i==0) { //it is not prime

break;

}

if (i==num) { //loop has completed all iterations

cout<<num<<endl;

}

return 0;

}

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