آموزش جاوااسکریپت جلسه ۷ پارت ۲

Detailed Summary of “Java Script by Behzad Farhadi – Session 07 – Part 2”

Introduction

In this session, Behzad Farhadi continues his JavaScript tutorial by explaining how to write functions that can handle different conditions and output results accordingly. The session focuses on teaching how to create functions that can check whether a number is positive, negative, or zero, as well as how to evaluate a student’s exam score.

Main Points

1. Creating a Function to Check Numbers (Positive, Negative, Zero)
   Behzad demonstrates how to write a function called checkNumber that takes a number as an argument and checks whether it is positive, negative, or zero.

   • The function uses the if statement to check if the number is greater than zero (positive), less than zero (negative), or equal to zero.
   • The output is displayed using console.log, indicating whether the number is positive, negative, or zero.
   • He also shows how to call the function with different inputs (e.g., checkNumber(10) or checkNumber(-1)).

2. Example with an Exam Score
   Next, Behzad demonstrates a function for checking a student’s exam score to determine if they passed or failed.

   • The function, checkExamScore, takes an exam score as input and checks whether it is greater than or equal to 60.
   • If the score is 60 or above, the function prints “You passed”. If it is below 60, it prints “Unfortunately, you failed”.
   • He then modifies the function to handle the case where the score is exactly 60, printing a conditional message: “You passed conditionally”.

3. Using else if for Multiple Conditions
   Behzad explains how to use else if to add more conditions to the function. For instance, when checking if a score is exactly 60, an additional condition is added to print a special message for a score of 60.

Conclusion

In this part of the session, Behzad Farhadi effectively demonstrates how to write functions to evaluate simple conditions like positive/negative/zero checks and pass/fail logic based on an exam score. He also emphasizes how to use if, else, and else if statements to handle multiple conditions in JavaScript.