Summary of how javascript operates Math objects

// Mathematical function -- abs returns the absolute value of a number var a;/* a = Math. abs (-12); alert (a); // 12 // mathematical function -- arccosine of acos return number a = Math. acos (numeric expression); // mathematical function -- asin returns the positive cosine of a = Math. asin (numeric expression); // mathematical function -- atan returns the arc tangent of a = Math. atan (numeric expression); // The mathematical function -- ceil returns the smallest integer greater than or equal to its numeric parameter. A = Math. ceil (-10.1); alert (a); //-10 // returns the cosine of cos. A = Math. cos (numeric expression); // mathematical function -- exp returns the power of e (the base of the natural logarithm. A = Math. exp (4); alert (a); // 54.59815003314423 // mathematical function -- the floor returns the maximum integer a = Math. floor (10.2); alert (a); // 10 // mathematical function -- log returns the natural logarithm of a = Math. log (4); alert (a); // 1.3862943611198906 // mathematical function -- max returns zero or multiple numeric expressions that are greater than limit. A = Math. max (, 3); alert (a); // 20 // mathematical function -- min returns a smaller value among zero or multiple numeric expressions. A = Math. min (0,-); alert (a); //-1 // mathematical function -- pow returns the specified power of the base expression. A = Math. pow (100); alert (a); // mathematical function -- random returns a pseudo-random number between 0 and 1. a = Math. random (); alert (a); // mathematical function -- round returns the rounded integer a = Math. round (10.52); alert (a); // 11 // mathematical function -- sin returns the sine of a number. A = Math. sin (numeric expression); // mathematical function -- sqrt returns the square root of a number = Math. sqrt (25); alert (a); // 5 // mathematical function -- tan returns the tangent of a = Math. tan (numeric expression );*/