OOQ

#JavaScript #JavaScript / Functions / Number() / Function that converts a string to a number Number() Number() is a function that converts a string to a number. Grammar Number( object ) object: Enter a string or a variable whose value is a string. Returns NaN for values ​​that cannot be converted to a number. example The value of variable c is 12, which is character 1 plus character 2. The value..

#JavaScript #isNaN() isNaN() isNaN() - A function that checks if the parameter is a number (NaN is Not a Number). Grammar isNaN( value ) value: Enter the value to check. Returns true if the parameter is not a number, false if it is a number. example Returns false because 123.123 is a number. '123.123' is quoted but treated as a number and returns false. 'Not a Number' returns true because it is ..

#JavaScript #Global Variables and Local Variables global and local variables Variables can be divided into Global Variables and Local Variables according to their scope. A global variable is a variable declared outside a function and accessible throughout the program. A local variable is a variable declared within a function that is created when the function is executed and destroyed when the fu..

#javascript #isFinite() isFinite() isFinite() is a function that checks if a parameter is finite. Grammar isFinite( value ) value: Enter the value to check. Returns true if the number is finite, false if the number is infinite or not a number. example Returns true since 123.123 is a finite number. Infinity returns false because it is an infinite number. Returns false because Not a Number is a ch..

#JavaScript #eval() eval() eval() is a function that recognizes a string as code. Grammar eval( string ) for example eval( '2+2' ) is the computed result 4, not the string 2+2. example

#JavaScript #avaScript / Functions / encodeURI(), encodeURIComponent(), decodeURI(), decodeURIComponent() encodeURI(), encodeURIComponent(), decodeURI(), decodeURIComponent() encodeURI() : A function that encodes without :, ;, /, =, ?, &, etc. used in internet addresses. encodeURIComponent() : a function that encodes all characters. decodeURI() : A function that decodes a string encoded with enc..

#javascript #Global Variables #Local Variables global and local variables Variables can be divided into Global Variables and Local Variables according to their scope. A global variable is a variable declared outside a function and accessible throughout the program. A local variable is a variable declared within a function that is created when the function is executed and destroyed when the funct..

#JavaScript #Declare and call javascript/function/function declare a function 1. function functionName( argument1, argument2, ... ) { // Do Something } 2. var functionName = function( argument1, argument2, ... ) { // Do Something }; call a function functionName( value1, value2, ... ); If you declare a function with Method 1, the function call can be made before the function declaration or after ..

#javascript #JavaScript / Repeat Statements / while, do - while, for There are three iteration statements in JavaScript: while, do - while, and for. while grammar var i = 0; while ( i < 10 ) { // do something i++; } It runs from 0 to 9 for i and if i is 10 it doesn't run and goes on. Note that you must include i++ which increments i. If i++ is missing, the value of i will always be 0, so it will..

#JavaScript #JavaScript / conditional statement / switch The most basic conditional statement is the if. However, the disadvantage is that if there are many values ​​to compare in the conditional expression, the code becomes longer and less readable. In such cases, it is recommended to use switch. grammar switch ( condition ) { case value1: statement1; break; case value2: statement2; break; ... ..