? User Input in C

C allows you to take input from users using functions like scanf() and fgets() from the standard input (stdin).

? Using scanf() (most common)

c
#include <stdio.h>int main() {    int age;    printf("Enter your age: ");    scanf("%d", &age);    printf("You are %d years old.\n", age);    return 0;}

? Format Specifiers:

?? For strings, scanf("%s", str); stops at the first whitespace.

? Example: Multiple Inputs

c
int a, b;scanf("%d %d", &a, &b);

? Reading Strings with Spaces ? Use fgets()

c
char name[50];printf("Enter full name: ");fgets(name, sizeof(name), stdin);printf("Hello, %s", name);

? Input a Character

c
char ch;scanf(" %c", &ch);  // Note the space before %c to catch newline

? Pro Tips:

• Always use & before variable names in scanf() (except for strings).

• fgets() is safer than scanf("%s") for reading full lines.