Java Exercises: Compute the square root of a given integer
Java Basic: Exercise-117 with Solution
Write a Java program to compute the square root of a given integer.
Pictorial Presentation:

Sample Solution:
Java Code:
import java.util.*;
public class Exercise117 {
public static void main(String[] args)
{
int num;
Scanner in = new Scanner(System.in);
System.out.print("Input a positive integer: ");
int n = in.nextInt();
System.out.printf("Square root of %d is: ",n);
System.out.println(sqrt(n));
}
private static int sqrt(int num) {
if (num == 0 || num == 1) {
return num;
}
int a = 0;
int b = num;
while (a <= b) {
int mid = (a + b) >> 1;
if (num / mid < mid) {
b = mid - 1;
} else {
if (num / (mid + 1) <= mid) {
return mid;
}
a = mid + 1;
}
}
return a;
}
}
Sample Output:
Input a positive integer: 25 Square root of 25 is: 5
Flowchart:

Java Code Editor:
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Previous: Write a Java program which iterates the integers from 1 to 100. For multiples of three print "Fizz" instead of the number and for the multiples of five print "Buzz". When number is divided by both three and five, print "fizz buzz".
Next: Write a Java program to get the first occurrence (Position starts from 0.) of a string within a given string.
What is the difficulty level of this exercise?
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Java: Tips of the Day
countOccurrences
Counts the occurrences of a value in an array.
Use Arrays.stream().filter().count() to count total number of values that equals the specified value.
public static long countOccurrences(int[] numbers, int value) { return Arrays.stream(numbers) .filter(number -> number == value) .count(); }
Ref: https://bit.ly/3kCAgLb
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