Javascript Operators & Conditional Statements PDF
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This document provides examples of JavaScript operators and conditional statements. It explains arithmetic, assignment, and comparison operators. The document includes example code and output.
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TERM 2 | COMPUTER TECH | ETA REVIEWER LESSON 1: JAVASCRIPT OPERATORS Operators are special symbols that perform operations on variables and values. 1. Arithmetic Operators - used to perform mathematical operations like addition, subtraction, multiplication, etc. Example Code: v...
TERM 2 | COMPUTER TECH | ETA REVIEWER LESSON 1: JAVASCRIPT OPERATORS Operators are special symbols that perform operations on variables and values. 1. Arithmetic Operators - used to perform mathematical operations like addition, subtraction, multiplication, etc. Example Code: var a = 2; var b = 5; document.write(“Sum: “ + (a+b)); //Output: Sum: 7 2. Assignment Operators (=) - are used to assign values to variables. Example Code: var a = 10; var b = 20; a+=b // a = a + b // a = 10 + 20 document.write(a) //Output: 30 3. Comparison Operators - compare two values/variables and return a boolean result: True or False. Operator Meaning Note == Is equal to It doesn’t consider the data type, as long as the characters are the same, the boolean value is True. === Is strictly equal to Strictly considers the data type. != Not equal to It doesn’t consider the data type, as long as the characters are the same, the boolean value is True. !== Is strictly not equal to Strictly considers the data type. > Greater than < Less than >= Greater than or equal to 55); // true document.write( c || d) //Output: true var e = (75 == 100); // false document.write(!(e)); //Output: false 5. String Operator (+) - used to link two or more string values together. Example Code: var name = “Miguel”; document.write(“My name is “ + name + “.”) //Output: My name is Miguel. LESSON 2: JAVASCRIPT CONDITIONAL STATEMENTS If statement - to specify a block of JavaScript code to be executed if a condition is true. Else statement - to specify a block of code to be executed if the condition is false. Else if statement - to specify a new condition if the first condition is false. Example Code: #1 var name = “Juan”; if (name == “Juan”) { document.write(“Match”); } else{ document.write(“Not a match”) } //Output: Match #2 if (BMI < 18.5) { document.write("Underweight”); } else if (BMI >= 18.5 && BMI
