Math.E        // returns Euler's number
Math.PI       // returns PI - 3.14...
Math.SQRT2    // returns the square root of 2
Math.SQRT1_2  // returns the square root of 1/2
Math.LN2      // returns the natural logarithm of 2
Math.LN10     // returns the natural logarithm of 10
Math.LOG2E    // returns base 2 logarithm of E
Math.LOG10E   // returns base 10 logarithm of E 

Math.round(4.5) // 5
Math.round(4.4) // 4  

Math.floor(4.5) // 4
Math.floor(4.4) // 4 

Math.pow(4, 0.5) // 2

Math.sin(1); // 0.8414709848078965

Math.log(10); // 2.302585092994046
Math.log2(1024); // 10
Math.log10(100000); // 5    

Math.round(x)  // returns x rounded to its nearest integer 
Math.ceil(x)   // returns x rounded up to its nearest integer
Math.floor(x)  // returns x rounded down to its nearest integer 
Math.trunc(x)  // returns integer part of x 
        
Math.sign(x)   // returns if x is negative, null or positive (-1, 0, 1)
Math.pow(x, y) // returns the value of x to the power of y:
Math.sqrt(x)   // returns the square root of x:
Math.abs(x)    // returns the absolute (positive) value of x:
Math.sin(x)    // returns the sine (a value between -1 and 1) of the angle x (given in radians) 
Math.cos(x)    // returns the cosine (a value between -1 and 1) of the angle x (given in radians) 
        
Math.min()     // used to find the lowest value
Math.max()     // used to find the highest value in a list of arguments
Math.random()  //  returns a random number between 0 (inclusive), and 1 (exclusive)
        
Math.log(x)   // returns the natural logarithm of x
Math.log2(x)  // returns the base 2 logarithm of x
Math.log10(x) // returns the base 10 logarithm of x

Math.trunc(4.44321) // 4
Math.trunc(4.99230) // 4 

Math.sqrt(64) // 8

Math.cos(1); // 0.5403023058681398

Math.min(1, 3, 2) // 1

Math.floor(Math.random() * 3); // Returns a random integer, 0, 1, or 2  
        
Math.floor(Math.random() * 3) + 1; // Returns a random integer, 1, 2, or 3
        
function getRandomNum(min, max) {
return Math.floor(Math.random() * (max - min) ) + min;  // Returns random number (max not included)
}

function getRandomInt(min, max) {
return Math.floor(Math.random() * (max - min + 1) ) + min;  // Returns a random number (max included)  
}

Math.ceil(4.5) // 5
Math.ceil(4.4) // 5 

Math.sign(3) // 1
Math.sign(0)  // 0
Math.sign(-3) // -1

Math.abs(-3) // 3

Math.max(1, 3, 2) // 3