Your program will need a loop to check the characters of the String entered by t
ID: 3925477 • Letter: Y
Question
Your program will need a loop to check the characters of the String entered by the user. You can extract a character as a char variable using the charAt( position ) method of a string where position is the character position in the string starting at zero. Once you have extracted a character from the String, you can determine if it is a numerical digit with the static boolean method Character.isDigit( courseChar ) where courseChar is the char extracted from the String. This method will return true if courseChar is a number. If it is, you should use that digit to determine the course level. Note that unlike Strings, you can compare char variables with the usual double equals sign, such as
if ( courseChar == '3')
Remember to break from the loop once you have found the first numerical digit.
If the first numerical digit is not 1 to 4 or if there is no numerical digit, your program can respond in any way you want, except to get a program error.
Explanation / Answer
import java.util.Scanner;
class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner(System.in); // scanner to get user input
String text; // declare a text variable to store input
System.out.print("Enter a string:");
text = sc.next();
char courseChar=''; // initilize courseChar to null
boolean beginner = false;
for(int i=0;i<text.length();i++){ // for each character in text
courseChar = text.charAt(i); // get char at i.
if(Character.isDigit(courseChar)){ // check if it is a digit
if(courseChar == '1' || courseChar == '2' || courseChar == '3' || courseChar == '4'){ // courseChar is between 1 to 4
beginner = true;
}
break; // break loop as a digit is found
}
}
if(beginner){ // if beginner is true print as beginner course
System.out.println("beginner course");
}
else{ // print course number
System.out.println("Course "+courseChar);
}
sc.close(); // close scanner
}
}
/* sample output
*/
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.