if...else Statement

The `if...else` Statement

What is an `if...else` Statement?

The if...else statement is used when you have two possible paths of execution. It allows the program to perform one action if a condition is True and a different action if the condition is False.

The if block: Executes only if the condition is met.
The else block: Acts as a "catch-all" that executes if the condition is not met.

[Image of if-else flowchart in C programming]

Syntax

        if (condition) {

            // Code runs if condition is TRUE

        } else {

            // Code runs if condition is FALSE

        }

Practical Examples

Example 1: Pass or Fail Logic

int marks = 25;

if (marks >= 35) {
    printf("Result: Passed\n");
} else {
    printf("Result: Failed\n");
}

In this case, since 25 is less than 35, the "Failed" message will be displayed.

Example 2: Even or Odd Checker

int num = 10;

if (num % 2 == 0) {
    printf("The number is Even.\n");
} else {
    printf("The number is Odd.\n");
}

Important Note: Only one of the two blocks can ever run. The computer evaluates the condition once and chooses the path immediately—it never executes both!

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