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Challenge: If Statement
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You have already explored the importance of control flow in programming. Now, it is time to focus on the basic building block of decision-making in C: the if statement. The if statement allows you to execute a block of code only when a specific condition is true. Its syntax is straightforward:
main.c
123if (condition) { // Statements to execute if condition is true }
Here, the condition is an expression that evaluates to either true (non-zero) or false (zero). If the condition is true, the code inside the braces runs; otherwise, it is skipped.
main.c
123456789101112#include <stdio.h> int main() { int age = 20; // User is an adult if (age >= 18) printf("Access granted.\n"); return 0; }
This simple structure enables your programs to make decisions and respond differently to various inputs or situations.
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Write a function that uses an if statement to check if a given integer is positive. If the number is greater than zero, return a value indicating that it is positive.
- Use an if statement to test if
numberis greater than zero. - If true, return a value (such as 1) to indicate the number is positive.
- Otherwise, return a value (such as 0) to indicate the number is not positive.
Oplossing
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