C if statement

The if statement in C is a control flow statement that allows the execution of a block of code if a specified condition is true. If the condition evaluates to a non-zero value (true), the code inside the if block is executed; otherwise, it is skipped.

Syntax:

if (condition)
{
    // Code to execute if condition is true
}

Explanation:

• condition: This is an expression that evaluates to a boolean value (true or false).
• The code inside the curly braces {} will execute only if the condition is true.

Example 1:

#include <stdio.h>

int main() {
    int age = 18;
    // Checking if the person is eligible to vote
    if (age >= 18)
    {
        printf("You are eligible to vote.");
    }
    return 0;
}

Explanation:

• Condition: age >= 18 is the condition being checked.
• Since age is 18, which is equal to 18, the condition evaluates to true.

Output:

Example 2: If number is positive

#include <stdio.h>

int main() {
    int number = 15;
    // Checking if the number is positive
    if (number > 0)
    {
        printf("Number is positive");
    }
    return 0;
}

Explanation:

• Condition: number >= 0 is the condition being checked.
• Since number is greater than 0, then condition evaluates to true.

Output:

C if statement – Interview Questions

C if statement – Objective Questions (MCQs)

int x = 10;
if (x == 10)
printf("Ten");

Related C if statement Topics