C Syntax & Output

Headers, main, printf and comments.

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#include <stdio.h> loads the standard input/output library, which provides printf().
Every program starts in the main() function.
Statements end with ; and blocks use { }.
\n inserts a new line; \t a tab.
return 0; tells the system the program finished successfully.

Comments: // single line and /* multi-line */.

Key Takeaways: C Syntax & Output

Mastering C Syntax & Output helps you write clean and reliable C code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.

C Syntax & Output Code Example

#include <stdio.h>

int main() {
    // Print on separate lines
    printf("Line one\n");
    printf("Tab\tseparated\n");
    /* printf("This is commented out"); */
    printf("%d + %d = %d\n", 2, 3, 2 + 3);
    return 0;
}

Output