This function of the Math object returns the value of ex – 1, where x and e are the base and exponents of natural algorithms.SyntaxIts Syntax is as followsMath.expm1(6);Example Live Demo    JavaScript Example           var result = Math.expm1(6);       document.write("Result: "+result);     OutputResult: 402.4287934927351

The clz32() function of the Math object returns the number of zero bits in the starting of the 32-bit binary representation of a number.SyntaxIts Syntax is as followsMath.clz32(31)Example Live Demo    JavaScript Example           var result = Math.clz32(31);       document.write("Result: "+result);     OutputResult: 27

The cbrt() function of the Math object accepts a number and returns its cube root.SyntaxIts Syntax is as followsMath.cbrt(729)Example    JavaScript Example           var result = Math.cbrt(729));       document.write("");       document.write("Cube root of the given number: "+result);     OutputCube root of the given number: 9

The atanh() function of the Math object accepts a number and returns its hyperbolic arc arctangent value in radians. To convert the resultant value into degrees, multiply it with 180 and divide the result by 3.14159 (pi value).SyntaxIts Syntax is as followsMath.atanh(0.5)Example Live Demo    JavaScript Example           var result = Math.atanh(0.5);       document.write("arctangent value: "+result);       document.write("");       document.write("hyperbolic arctangent value in degrees: "+result*180/Math.PI);     Outputarctangent value: 0.5493061443340548 arctangent value in degrees: 31.47292373094538

The asinh() function of the Math object accepts a number and returns its hyperbolic arc sine value in radians. To convert the resultant value into degrees, multiply it with 180 and divide the result by 3.14159 (pi value).SyntaxIts Syntax is as followsMath.asinh(0.5)Example Live Demo    JavaScript Example           var result = Math.asinh(90);       document.write("Hyperbolic arcsine value: "+result);       document.write("");       document.write("Hyperbolic arcsine value in degrees: "+result*180/Math.PI);     OutputHyperbolic arcsine value: 5.192987713658941 Hyperbolic arcsine value in degrees: 297.53627905594817

The acosh() function of the Math object accepts a number and returns its hyperbolic arc cosine value in radians. To convert the resultant value into degrees, multiply it with 180 and divide the result by 3.14159 (pi value).SyntaxIts Syntax is as followsMath.acosh(0.5)Example Live Demo    JavaScript Example           var result = Math.acosh(90);       document.write("Hyperbolic arccosine value: "+result);       document.write("");       document.write("Hyperbolic arccosine value in degrees: "+result*180/Math.PI);     OutputHyperbolic arccosine value: 5.192925985263684 Hyperbolic arccosine value in degrees: 297.5327422794238

The keys() function of Map object is similar to entries but, it returns an iterator object containing the keys of a map object.SyntaxIts Syntax is as followsMap.keys()Example Live Demo    JavaScript Example           var mapVar = new Map();       mapVar.set('1', 'Java');       mapVar.set('2', 'JavaFX');       mapVar.set('3', 'HBase');       mapVar.set('4', 'Neo4j');       var it = mapVar.keys();       for(i=0; i

The has() function of Map object accepts a key in string format and returns a boolean value, if specified key exists it returns true else returns false.SyntaxIts Syntax is as followsmapVar.has()Example Live Demo    JavaScript Example           var mapVar = new Map();       mapVar.set('1', 'Java');       mapVar.set('2', 'JavaFX');       mapVar.set('3', 'HBase');       mapVar.set('4', 'Neo4j');       document.write(mapVar.has('3'));     OutputtrueExample Live Demo    JavaScript Example           var mapVar = new Map();       mapVar.set('1', 'Java');     ... Read More

The get() function of Map object accepts a key in string format and returns its respective value.SyntaxIts Syntax is as followsmapVar.get()Example Live Demo    JavaScript Example           var mapVar = new Map();       mapVar.set('1', 'Java');       mapVar.set('2', 'JavaFX');       mapVar.set('3', 'HBase');       mapVar.set('4', 'Neo4j');       document.write(mapVar.get('3'));     OutputHBase

The forEach() function of Map object returns an iterator of the corresponding Map object and using this you can retrieve the key Value pairs of the map.SyntaxIts Syntax is as followsmapVar.forEach()Example Live Demo    JavaScript Example           var mapVar = new Map();       mapVar.set('1', 'Java');       mapVar.set('2', 'JavaFX');       mapVar.set('3', 'HBase');       mapVar.set('4', 'Neo4j');       function show(values) {          document.write(values);          document.write("");       }       mapVar.forEach(show);     OutputJava JavaFX HBase Neo4j