How do you dynamically name a variable in JavaScript?

In JavaScript, dynamic variable names can be achieved by using 2 methods/ways given below.

eval(): The eval() function evaluates JavaScript code represented as a string in the parameter. A string is passed as a parameter to eval().
Window object: JavaScript always has a global object defined.

How do you concatenate a variable name in JavaScript?

In JavaScript, we can assign strings to a variable and use concatenation to combine the variable to another string. To concatenate a string, you add a plus sign+ between the strings or string variables you want to connect. let myPet = ‘seahorse’; console.

How do you declare a dynamic variable?

Example

class Program.
dynamic a = 10; //Create Dynamic variable a, which value assige as int type.
dynamic b = “Hello”; //Create Dynamic variable b, which value assige as string type.
dynamic c = 5.4; //Create Dynamic variable c, which value assige as double type.

What is dynamic variable JavaScript?

Dynamic variables are those types of variables that don’t have any specific name in the code through hard coded. A dynamic variable name is auto-generated while running the program. It is possible to create a dynamic variable in JavaScript and then using it for a specific task.

What is a dynamic variable?

In programming, a dynamic variable is a variable whose address is determined when the program is run. In contrast, a static variable has memory reserved for it at compilation time.

How do you concatenate strings in JavaScript?

The + Operator The same + operator you use for adding two numbers can be used to concatenate two strings. You can also use += , where a += b is a shorthand for a = a + b . If the left hand side of the + operator is a string, JavaScript will coerce the right hand side to a string.

How do you change a variable name Dynamicly in Java?

There are no dynamic variables in Java. Java variables have to be declared in the source code1. Depending on what you are trying to achieve, you should use an array, a List or a Map ; e.g. It is possible to use reflection to dynamically refer to variables that have been declared in the source code.

What is dynamic variable?

A dynamic variable is a variable you can declare for a StreamBase module that can thereafter be referenced by name in expressions in operators and adapters in that module. In the declaration, you can link each dynamic variable to an input or output stream in the containing module.

How do you eval a string in JavaScript?

eval() is a function property of the global object. The argument of the eval() function is a string. If the string represents an expression, eval() evaluates the expression. If the argument represents one or more JavaScript statements, eval() evaluates the statements.

How do you initialize a string in JavaScript?

How to initialize String in JavaScript?

Initializing String using “String literal” method: While creating a string object using the “string literal”, the value of the String is assigned directly to the variable.
Initializing String using “new” Keyword:
Length.
charAt.
charCodeAt.
Concat.
Match.
indexOf.

How do I declare a variable in JavaScript?

In JavaScript, a variable stores the data value that can be changed later on. Use the reserved keyword var to declare a variable in JavaScript. Syntax: var < variable-name >; var < variable-name > = < value >; A variable must have a unique name. The following declares a variable. Example: Variable Declaration.

How do I convert an integer to binary in JavaScript?

Method 1: Using library methods. In JavaScript,there exists a method parseInt (),that takes in two arguments first one is a string and second a number that represents a

Method 2: Reducing the array. In this method we iterate over the binary array and construct a decimal based on the corresponding binary numbers.

Example

Output

How to compare strings correctly in JavaScript?

Program: Using String.equals () : In Java,string equals () method compares the two given strings based on the data/content of the string.

Syntax: Here str1 and str2 both are the strings which are to be compared.

Examples:

How to use the switch statement in JavaScript?

– In JavaScript, the switch statement checks the value strictly. So the expression’s result does not match with case “1”. – Then the switch statement goes to the second case. Here, the expressions’s result matches with case 1. – The break statement terminates the block and control flow of the program jumps to outside of the switch block.