Reading-notes

java script

programming language we use make the website intractive (dynamic).

JavaScript’s syntax expressions and operators, including assignment, comparison, arithmetic, bitwise, logical, string, ternary and more.

Operators

JavaScript has the following types of operators:

• Assignment operators For example 3+4 or x*y.
• Comparison operators For example x = y
• Arithmetic operators For example (+), subtraction (-)multiplication
• Bitwise operators For example a & b
• Logical operators For example && and ||
• String operators For example 'my ' + 'string'
• Conditional (ternary) operator For example condition ? val1 : val2
• Comma operator For evaluates both of its operands and returns the value of the last operand
• Unary operators For example delete typeof
• Relational operators For example in instanceof

## Operator precedence The precedence of operators determines the order they are applied when evaluating an expression. You can override operator precedence by using parentheses.

## Expressions An expression is any valid unit of code that resolves to a value.

For example : x = 7 .

## Adding Strings and Numbers: Example: var x = 5 + 5;

Control flow

The control flow is the order in which the computer executes statements in a script.

Code is run in order from the first line in the file to the last line, unless the computer runs across the (extremely frequent) structures that change the control flow, such as conditionals and loops.

including conditionals, loops and functions. Parts of a script may also be set to execute when events occur.