javascript

String methods:

concat()
endsWith()
includes()
indexOf()
lastIndexOf()
repeat()
replace()
search()	
slice()
split()
startsWith()
substr()
substring()
toLowerCase()
toUpperCase()
trim()

Number Methods:

toFixed(x)
toExponential(x)
toString()

Global Methods:

console
alert
prompt
confirm
Number()
isNaN()
parseFloat()
parseInt()
String()
Boolean()


Variables and Functions:

1. Add, subtract, Multiplication, division, module, power, compare string, compare number, compare values.
2. gradeFinder, check vowels, find prime number