The if-else statement in C++ helps the program make decisions by checking conditions. It allows the program to choose what action to take based on whether something is true or false.

How it works:

  • if: If a condition is true, the code inside the if block will run.
  • else: If the condition is false, the code inside the else block will run.

    Syntax:
  • if (condition) {
  •     // Code to run if condition is true
  • } else {
  •     // Code to run if condition is false
  • }

    Example:
  • #include <iostream>
  • using namespace std;

  • int main() {
  •     int number;
  •     cout << "Enter a number: ";
  •     cin >> number;

  •     if (number > 0) {
  •         cout << "The number is positive." << endl;
  •     } else {
  •         cout << "The number is not positive." << endl;
  •     }

  •     return 0;
  • }


  • Explanation:

    • The program asks the user to input a number.
    • If the number is greater than 0, it prints "The number is positive."
    • If the number is 0 or less, it prints "The number is not positive."

    In short:

    • if checks a condition.
    • else provides an alternative if the condition is false.

      Conclusion:

      The if-else statement in C++ is a powerful tool for making decisions in a program. It allows you to check a condition, and based on whether that condition is true or false, the program takes different actions.

      Summary:

      • if: Runs a block of code if the condition is true.
      • else: Runs a different block of code if the condition is false.
      • This helps in controlling the flow of your program based on specific conditions.

      Using if-else statements makes your program more dynamic and able to respond to different inputs or situations.

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