C Syntax

C syntax

Created By: chatGPT

C syntax refers to the set of rules that define how C programs are structured and written. Understanding C syntax is crucial for writing efficient and functional C code. Below are some key elements of C syntax:

Comments are used to provide explanations or annotations in the code. They are ignored by the compiler. In C, single-line comments start with //, while multi-line comments are wrapped between /* and */.

// This is a single-line comment

/* This is a
   multi-line comment */

Variables must be declared before they can be used. The declaration specifies the data type of the variable.

int age;
float salary;
char grade;

Data types in C include int, float, double, and char. Each data type serves a different purpose depending on the kind of data you want to store.

int num = 10;
float pi = 3.14;
double largeNumber = 123456.789;
char letter = 'A';

Control structures in C, such as if, else, for, and while, help in controlling the flow of a program. These structures enable you to make decisions and repeat actions.

if (num > 0) {
    printf("Positive number");
} else {
    printf("Negative number");
}

for (int i = 0; i < 5; i++) {
    printf("%d", i);
}

Functions are blocks of code that perform a specific task. They help in reducing code redundancy and improving organization. A function must be defined before it can be called.

void greet() {
    printf("Hello, World!");
}

greet();

Main function is the entry point of all C programs. Every C program must have a main function where the execution begins.

int main() {
    printf("Welcome to C programming!");
    return 0;
}

Headers are included at the beginning of the program to utilize various functions. For instance, you use <stdio.h> to enable input and output operations.

#include <stdio.h>