Ascii value with JS
a-z = 97-122
A-Z = 65-90
Get Ascii value from string
"string".charCodeAt(string index)
"HELLO".charCodeAt(0); // gives asccii for H : 72
"HELLO".charCodeAt(1); // gives asccii for E : 69
"HELLO".charCodeAt(2); // gives asccii for L : 76
"HELLO".charCodeAt(3); // gives asccii for L : 76
"HELLO".charCodeAt(4); // gives asccii for O : 79
"HELLO".charCodeAt(5); // gives asccii for \n : NaN
Get character from ascii value
String.fromCharCode(ascii value);
String.fromCharCode(72); // return H
charAt()
str.charAt(index)
It is simiral to access string with index
str[index]
8 bit Binary into char
binval = "01000001";
intval = parseInt( binval , 2 ); // cast to integer for given value, 2nd param is base
// intval = 65;
// ascii for 65 is A;