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Program: How to get square root of a number in java?


Math.sqrt() function returns rounded positive square root of the given number.

package com.java2novice.math;

public class MySqrtEx {

	public static void main(String a[]){
		System.out.println("Square root of 16 is: "+Math.sqrt(16));
		System.out.println("Square root of 4.6 is: "+Math.sqrt(4.6));
		System.out.println("Square root of 21 is: "+Math.sqrt(21));

Square root of 16 is: 4.0
Square root of 4.6 is: 2.1447610589527217
Square root of 21 is: 4.58257569495584
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List Of All Math Class Sample Programs:

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  2. How to get cube root of a value in java?
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  4. Example for Math.copySign() method.
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  13. How to calculate natural logarithm value of a number in java?
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  15. Example for Math.nextAfter() method.
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  17. How to get random number between 0 to 1 in java?
  18. Example for Math.rint() method.
  19. How to round-off decimal number to nearest integer in java?
  20. Example for Math.signum() method.
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  22. How to convert an angle from radians to degrees?
  23. How to convert an angle from degrees to radians?
  24. How to calculate trigonometric sine of an angle in java?
  25. How to calculate trigonometric cosine of an angle in java?
  26. How to calculate trigonometric tangent of an angle in java?
Knowledge Centre
Preemptive scheduling Vs Time slicing?
Preemptive scheduling: The highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence.

Time slicing: A task executes for a predefined slice of time and then reenters the pool of ready tasks. The scheduler then determines which task should execute next, based on priority and other factors.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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