Java.lang.StrictMath class in Java | Set 2 (original) (raw)

Last Updated : 06 Aug, 2021

Java.lang.StrictMath Class in Java | Set 1
More methods of java.lang.StrictMath class

13. exp() : java.lang.StrictMath.exp(double arg) method returns the Euler’s number raised to the power of double argument.

Important cases:

Syntax:

public static double exp(double arg) Parameters: arg - argument passed. Returns: Euler’s number raised to the power of passed argument

14. cosh() : java.lang.StrictMath.cosh() method returns the hyperbolic cosine of the argument passed.

Special cases :

Syntax:

public static double cosh(double arg) Parameters: arg - The number whose hyperbolic cosine is to be returned. Returns: the hyperbolic cosine of the argument arg.

15. decrementExact() : java.lang.StrictMath.decrementExact() method decrements the value of passed argument by one.

Syntax:

public static int decrementExact(int arg) or public static long decrementExact(long arg) Parameters: arg - argument passed. Returns: return argument decremented by one. Throws: Exception if the result overflows long or int datatype, according to the argumented data type.

Java code explaining exp(), decrementExact(), cosh() method in lang.StrictMath class.

Java

import java.math.*;

public class NewClass

{

`` public static void main(String[] args)

`` {

`` double value = 2 ;

`` double coshValue = StrictMath.cosh(value);

`` System.out.println( "Hyperbolic Cosine of " + coshValue);

`` System.out.println( "" );

`` int result = StrictMath.decrementExact( 3051 );

`` System.out.println( "Use of decrementExact() : " + result);

`` System.out.println( "" );

`` double exponent = 34 ;

`` double expVal = StrictMath.exp(exponent);

`` System.out.println( "Value of exp : " + expVal);

`` }

}

Output:

Using addExact() : 9

acos value of Asini : NaN acos value of Asinj : 0.054858647341251204

cube root : 6.0

16. log10() : java.lang.StrictMath.log10() method returns the base10 logarithmic value of the passed argument.

Syntax: public static double log(double arg) Parameters: arg - argument passed. Returns: base10 logarithmic value of the argument passed.

17. pow() : java.lang.StrictMath.pow(double b, double e) method returns the value as be

Syntax: public static double pow(double b, double e) Parameters: b : base e : exponent Returns: value as baseexponent

18. incrementExact() : java.lang.StrictMath.incrementExact() method returns the argument by incrementing it’s value.

Syntax: public static int incrementExact(int arg) or public static long incrementExact(long arg) Parameters: arg - the argument Returns: incremented value of the argument

JAVA code explaining incrementExact(), log10(), pow() method in lang.StrictMath class.

Java

import java.lang.*;

public class NewClass

{

`` public static void main(String[] args)

`` {

`` int f1 = 30 , f2 = - 56 ;

`` f1 = StrictMath.incrementExact(f1);

`` System.out.println( "Incremented value of f1 : " + f1);

`` f2 = StrictMath.incrementExact(f2);

`` System.out.println( "Incremented value of f2 : " + f2);

`` System.out.println( "" );

`` double value = 10 ;

`` double logValue = StrictMath.log10(value);

`` System.out.println( "Log10 value of 10 : " + logValue);

`` System.out.println( "" );

`` double b = 10 , e = 2 ;

`` double power = StrictMath.pow(b, e);

`` System.out.println( "Use of pow() : " + power);

`` }

}

Output :

Incremented value of f1 : 31 Incremented value of f2 : -55

Log10 value of 10 : 1.0

Use of pow() : 100.0

19. signum() : java.lang.StrictMath.signum() method returns the signum value of the argument passed. 

                                -1    if x < 0
                signum fun(x) =  0    if x = 0
                                 1    if x > 0

Note:

Result is NaN, if passed the argument is Nan.

Syntax:

public static double signum(double x) or public static float signum(float x) Parameters: x - the argument whose signum value we need Returns: signum value of x

20. max() : java.lang.StrictMath.max(double v1, double v2) method returns the greater value out of the two passed argument values.
This method just compares using magnitude without considering any sign.

Syntax:

public static double max(double v1, double v2) Parameters: v1 - first value v2 - second value Returns: v1 or v2 based on which number is greater. It can return either of the two if v1 = v2.

21. round() : java.lang.StrictMath.round() method round off the passed argument upto closest decimal places.

Note: Result is 0, if the argument is NaN.

Syntax:

public static long round(long arg) or public static double round(double arg) Parameters: arg - argument needs to round off Returns: round off value of the argument

Java code explaining signum(), round(), max() method in lang.StrictMath class.

Java

import java.lang.*;

public class NewClass

{

`` public static void main(String args[])

`` {

`` double x = 10.4556 , y = - 23.34789 ;

`` double signm = StrictMath.signum(x);

`` System.out.println( "Signum of 10.45 = " + signm);

`` signm = StrictMath.signum(y);

`` System.out.println( "Signum of -23.34 = " + signm);

`` System.out.println( "" );

`` double r1 = StrictMath.round(x);

`` System.out.println( "Round off 10.4556 = " + r1);

`` double r2 = StrictMath.round(y);

`` System.out.println( "Round off 23.34789 = " + r2);

`` System.out.println( "" );

`` double m = StrictMath.max(r1, r2);

`` System.out.println( "Max b / w r1 and r2 = " + r2);

`` }

}

Output:

Signum of 10.45 = 1.0 Signum of -23.34 = -1.0

Round off 10.4556 = 10.0 Round off 23.34789 = -23.0

Max b/w r1 and r2 = -23.0

22. ulp() : java.lang.StrictMath.ulp() method returns Unit of least precision(ulp) ie. the least distance between two floating point numbers.
Here, it is the least distance b/w the argument and next larger value.

Syntax:

public static double ulp(double arg) or public static float ulp(float arg) Parameters: arg - argument passed. Returns: least distance b/w the argument and next larger value.

23. log1p() : java.lang.StrictMath.log1p() method returns natural log of (passed argument + 1).

Syntax:

public static double log1p(double arg) Parameters: arg - the argument Returns: log of (argument + 1). This result is within 1 unit in the last place of exact result.

Java code explaining ulp(), log1p() method in lang.StrictMath class.

Java

import java.lang.*;

public class NewClass

{

`` public static void main(String args[])

`` {

`` double x = 34.652 , y = - 23.34789 ;

`` double u = StrictMath.ulp(x);

`` System.out.println( "ulp of 34.652 : " + u);

`` u = StrictMath.ulp(y);

`` System.out.println( "ulp of -23.34789 : " + u);

`` System.out.println( "" );

`` double l = 99 ;

`` double l1 = StrictMath.log1p(l);

`` System.out.println( "Log of (1 + 99) : " + l1);

`` l1 = StrictMath.log( 100 );

`` System.out.println( "Log of 100 : " + l1);

`` }

}

Output:

ulp of 34.652 : 7.105427357601002E-15 ulp of -23.34789 : 3.552713678800501E-15

Log of (1 + 99) : 4.605170185988092 Log of 100 : 4.605170185988092