Answer: str[0].toUpperCase();
Explanation:
str[0] is pointing to the first character of the entire string and the code str[0].toUpperCase() will convert the characters to upper case if they are in lowercase and will remain unchanged if they are already in upper case.
Question 1:
4. it increases the number of employees
Question 2:
2. false
Question 3:
2. it causes great damage to the ozone layer
Question 4:
1. true
D is the answer. Have a good day!
Answer:
The Solution Code is written in Java.
- public class Main {
- public static void main(String[] args) {
- System.out.print("Please enter an integer: ");
- Scanner input = new Scanner(System.in);
- int number = input.nextInt();
- System.out.print("Prime numbers less than or equal to " + number + " : ");
- for(int i=2; i <= number; i++){
- if(checkPrime(i)){
- System.out.print(i + " ");
- }
- }
- }
- public static Boolean checkPrime(int num){
- for(int i=2; i < num; i++)
- {
- if(num % i == 0){
- return false;
- }
- }
- return true;
- }
- }
Explanation:
Firstly, we create a function to check if a number is prime (Line 18 - 27).
- This function will take one input value which is an integer, num.
- To check if the input num is a prime, we can use modulus operator, %, to confirm if the num is divisible by any number starting from 2 to num - 1 (Line 19 - 24).
- If the num is divisible by any number expect 1 and itself, it should equal to zero and return false to indicate it is not a prime number.
- If all the num (except 1 and itself) is not divisible, the function will return true (Line 25).
Next, in our main program part (Line 3 - 16)
- Prompt the user to input a number (Line 5 - 7)
- Using a for-loop, we can keep calling the checkPrime() function by passing a current number (starting from 2 to input number) as argument (Line 12). The checkPrime() function will run and return true it the current number is prime, return false if it is not prime.
- If the checkPrime() function return true, it will print the current number before proceed to the iteration of the for-loop to repeat the same check prime procedure (Line 13)
- At the end all the prime numbers less than or equal to the input number will be printed out in the terminal
