- C Programming Examples
- C Programming Examples
- C Print Hello World
- C Get Input from User
- C Print Integer
- C Add Two Numbers
- C Add Subtract Multiply Divide
- C Add n Numbers
- C Area Perimeter of Square
- C Area Perimeter of Rectangle
- C Area Circum of Circle
- C Fahrenheit to Celsius
- C Celsius to Fahrenheit
- C Inches to Centimeters
- C Kilogram to Gram
- C Reverse a Number
- C Swap Two Numbers
- C Interchange Numbers
- C Print ASCII Value
- C Print Fibonacci Series
- C Check Palindrome or Not
- C Check Armstrong or Not
- C Find Armstrong Numbers
- C Find nCr and nPr
- C Find Profit Loss
- C Sum of their Square
- C First & Last Digit Sum
- C Sum of All Digit
- C Product of All Digit
- C Print Total Digit in Number
- C Check Perfect Number
- C Find Basic Gross Salary
- C Round Number to Integer
- C Print Series upto n Term
- C Find Factors of Number
- C if-else & Loop Programs
- C Check Even or Odd
- C Check Prime or Not
- C Check Alphabet or Not
- C Check Vowel or Not
- C Check Leap Year or Not
- C Is Reverse Equal Original
- C Make Calculator
- C Add Digits of Number
- Count Positive Negative Zero
- C Largest of Two Numbers
- C Largest of Three Numbers
- C Smallest of Two Numbers
- C Smallest of Three Numbers
- C Find Factorial of Number
- C Find LCM & HCF
- C Find LCM of n Numbers
- C Find HCF of n Numbers
- C Find Arithmetic Mean
- C Find Average, Percentage
- C Find Student Grade
- C Print Table of Number
- C Print Prime Numbers
- C Find Discount Purchase
- C Calculate Parcel Charge
- C Calculate Wage of Labor
- C Print Phone Bill
- C Conversion programs
- C Decimal to Binary
- C Decimal to Octal
- C Decimal to Hexadecimal
- C Binary to Decimal
- C Binary to Octal
- C Binary to Hexadecimal
- C Octal to Decimal
- C Octal to Binary
- C Octal to Hexadecimal
- C Hexadecimal to Decimal
- C Hexadecimal to Binary
- C Hexadecimal to Octal
- C Pattern Programs
- C Pattern Printing Programs
- C Print Diamond Pattern
- C Print Floyd's Triangle
- C Print Pascal's Triangle
- C Array Programs
- C 1D Array Programs
- C Linear Search
- C Binary Search
- C Largest Element in Array
- C Smallest Element in Array
- C Second Largest/Smallest
- C Count Even Odd
- C Array Element at Even
- C Array Element at Odd
- C Print Even Array Elements
- C Print Odd Array Elements
- C Sum/Product of Even/Odd
- C Reverse an Array
- C Insert Element in Array
- C Delete Element from Array
- C Merge Two Arrays
- C Bubble Sort
- C Selection Sort
- C Insertion Sort
- C Print Common Elements
- C 2D Array Programs
- C Add Two Matrices
- C Subtract Two Matrices
- C Transpose a Matrix
- C Multiply Two Matrices
- C Sum All Matrix Elements
- C Largest Element in Matrix
- C Print Row Column Total
- C 3D Array Programs
- C String Programs
- C Print String
- C Find Length of String
- C Compare Two String
- C Copy a String
- C Concatenate String
- C Reverse a String
- C Count Vowels Consonants
- C Replace Vowel in String
- C Delete Vowels from String
- C Delete Word from String
- C Frequency of Character
- C Count Word in String
- C Remove Spaces from String
- C Sort a String
- C Sort String in Alphabetical
- C Sort Words in Ascending
- C Sort Words in Descending
- C Uppercase to Lowercase
- C Lowercase to Uppercase
- C Swap Two Strings
- C Check Anagram or Not
- C Check Palindrome String
- C Print Number in Words
- C Print Successive Character
- C Character without Space
- C Remove Extra Spaces
- C File Programs
- C Read a File
- C Write Content to File
- C Read & Display File
- C Copy a File
- C Merge Two Files
- C Reverse File
- C Count All Character in File
- C List Files in Directory
- C Encrypt & Decrypt a File
- C Delete a File
- C Misc Programs
- Generate Random Numbers
- C Print Date Time
- C Print Message with Time
- C Get IP Address
- C Print Smiling face
- C Pass Array to Function
- Add Two Numbers using Pointer
- C Address of Variable
- C Shutdown Computer
- C Programming Tutorial
- C Tutorial
- C Programming Library
- C Standard Library
- C Programming Test
- C Programming Test
- Give Online Test
- All Test List
C Program to Get Input from User
In this article, you will learn and get code on getting input from user at run-time using a C program. Here are the list of programs (based on user input-type) available over here:
- Get Integer Input
- Get Character Input
- Get String Input
Get Integer Input
To receive or get an integer input from the user in C programming, use the function scanf(). This function takes two argument. First one is the format specifier of input type. And second parameter is the address of variable related to input data. Let's take a look at the program given below:
#include<stdio.h> #include<conio.h> int main() { int num; printf("Enter the Number: "); scanf("%d", &num); printf("\nYou've entered: %d", num); getch(); return 0; }
This program was build and run under Code::Blocks IDE. Here is its sample run:
Now supply any integer value say 10 and press ENTER
key to see the following output:
Note - The %d format specifier is used to scan integer type value.
As you can see from the above program, the function scanf() has two arguments. The first argument specifies the format specifier of input data. And the second argument is the variable to which the value is going to be saved.
Note - Don't forgot to put address of (&) operator before the variable say num inside the function scanf() to scan any integer value.
To print the value, back on output screen, you have not to use any address of operator. Simply use the format specifier and the variable that contains the value. While scanning the input, the address of operator is used to put/store the entered value at the address of given variable say num.
Get Character Input
Now let's create another program that receives a character type input data from user at run-time:
#include<stdio.h> #include<conio.h> int main() { char ch; printf("Enter the Character: "); scanf("%c", &ch); printf("\nYou've entered: %c", ch); getch(); return 0; }
Here is its sample run:
The %c format specifier is used for character input/output.
What if User enters more than One Character
If user enters two or more characters as input, then above program scans and initialized the first character only to ch variable. Rest of the characters gets skipped. Therefore, if user enters codescracker as input, then above program prints only c as output.
Get String Input
This is the last program of this article. This program scans the string input from user. That is more than one character input from user. For example, this is codescracker.com:
#include<stdio.h> #include<conio.h> int main() { char str[100]; printf("Enter any String: "); gets(str); printf("\nYou've entered: %s", str); getch(); return 0; }
Here is its sample run assuming that, user enters this is codescracker.com as string input:
The %s format specifier is used for string input/output.
You can also use the scanf() function with %s format specifier to scan the string from user. But it is always recommended to scan any string using gets() function. Because, if you'll use scanf() function to scan the string, then it skips all the things after first space. That is, scanf() reads the string until a spaces gets occurred. But gets() reads complete string along with spaces.
Same Program in Other Languages
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