If-Else Statements in C

If-Else Statements in C: Making Decisions in Your Code

An if-else statement is a control flow statement used to execute different code blocks based on a specified condition. It allows you to make decisions and perform different actions depending on the outcome of a logical expression.

Syntax:

if (condition) {
    // Code to be executed if the condition is true
} else {
    // Code to be executed if the condition is false
}

condition: An expression that evaluates to either true or false.
if block: The code block to be executed if the condition is true.
else block: The code block to be executed if the condition is false (optional).

Example:

int number = 10;

if (number > 0) {
    printf("The number is positive.n");
} else {
    printf("The number is negative or zero.n");
}

In this example, the if statement checks if number is greater than 0. If it is, the first printf statement is executed. If not, the else block is executed.

Nested If-Else Statements:

You can nest if-else statements within each other to create more complex decision-making structures.

int grade = 85;

if (grade >= 90) {
    printf("Grade: An");
} else if (grade >= 80) {
    printf("Grade: Bn");
} else if (grade >= 70) {
    printf("Grade: Cn");
} else {
    printf("Grade: Fn");
}

Key Points:

The if statement is used to execute code conditionally.
The else block is optional and is executed if the condition is false.
Nested if-else statements can be used for more complex decision-making.
Use indentation to improve code readability.

In C programming, an if-else statement is a control statement that allows for conditional execution of code. It provides the ability to specify different blocks of code to be executed based on the evaluation of a condition. In this syntax, the condition is an expression that is evaluated to be either true or false.

If we want our programs to execute a different set of instructions when the condition is false, then we can use an else statement.

Key points about if-else statements:

Structure:
“if” block: Contains the code that will be executed if the condition is true.

“else” block: Contains the code that will be executed if the condition is false.
How it works:
The program evaluates the condition within the “if” statement.

If the condition is true, the code inside the “if” block is executed.

If the condition is false, the code inside the “else” block is executed (if present).

If-Else Statements in C