- C Programming Examples
- C Programming Examples
- C Print Hello World
- C Take Input from User
- C Print Integer
- C Add two Numbers
- 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 Check Reverse equal Original
- C Add Subtract Multiply & Divide
- C Make Calculator
- C Add Digits of Number
- C Calculate Average & Percentage
- C Calculate Arithmetic Mean
- C Calculate Student Grade
- C Print Table of Number
- C Print Prime Numbers
- C Add n Numbers
- C Interchange Numbers
- C Reverse Numbers
- C Swap two Numbers
- C Count Positive Negative & Zero
- C Find Largest of two Numbers
- C Find Largest of three Numbers
- C Find Factorial of Number
- C Find HCF & LCM
- C Calculate Area & Perimeter
- C Calculate Area & Circumference
- C Convert Fahrenheit to Centigrade
- C Convert Centigrade to Fahrenheit
- C Print ASCII Values
- C Print Fibonacci Series
- C Check Palindrome or Not
- C Check Armstrong or Not
- C Generate Armstrong Numbers
- C Find ncR nPr
- C Convert Decimal to Binary
- C Convert Decimal to Octal
- C Convert Decimal to Hexadecimal
- C Convert Binary to Decimal
- C Convert Binary to Octal
- C Convert Binary to Hexadecimal
- C Convert Octal to Decimal
- C Convert Octal to Binary
- C Convert Octal to Hexadecimal
- C Convert Hexadecimal to Decimal
- C Convert Hexadecimal to Binary
- C Convert Hexadecimal to Octal
- C Pattern Printing Programs
- C Print Diamond Pattern
- C Print Floyd Triangle
- C Print Pascal Triangle
- C Print smiling face
- C One Dimensional Array Program
- C Linear Search
- C Binary Search
- C Add Two Numbers using Pointer
- C Find Largest Element in Array
- C Find Smallest Element in Array
- C Reverse Array
- C Insert Element in Array
- C Delete Element from Array
- C Merge two Array
- C Bubble Sort
- C Selection Sort
- C Insertion Sort
- C Two Dimensional Array Program
- C Add two Matrices
- C Subtract Matrices
- C Transpose Matrix
- C Multiply Matrices
- C Three Dimension Array Program
- C Print String
- C Find Length of String
- C Compare two String
- C Copy String
- C Concatenate String
- C Reverse String
- C Delete Vowels from String
- C Delete Words from Sentence
- C Find Frequency of Character
- C Count Word in Sentence
- C Remove Spaces from String
- C Sort a String
- C Convert Uppercase to Lowercase
- C Convert Lowercase to Uppercase
- C Swap two Strings
- C Check Anagram or Not
- C Generate Random Numbers
- C Read File
- C Write to File
- C Read & Display File
- C Copy File
- C Merge two File
- C List Files in Directory
- C Delete File
- C Encrypt and Decrypt Files
- C Print Date
- C Get IP Address
- C Shutdown Computer
- C New Programs
- C Compute Charge to Send Parcel
- C Compute Telephone Bills
- C Find Discounted Purchase Amount
- C Find Wage of Labour
- C Round Off Floating-point Number
- C Find Bonus & Gross Salary
- C Sum/Product of Even/Odd Digit
- C Print Series upto N Term
- C Find Sum of All Digit
- C Find Product of All Digit
- C Find Total Number of Digit
- C Print all Factors of Number
- C Check Perfect Number or Not
- C Find Second Largest & Smallest
- C Print Sum of Row & Column
- C Common Element in Two Array
- C Count Space Tab Newline in file
- C Count with/without Space
- C Smallest of Three Numbers
- C Smallest of Two Numbers
- C Remove extra Spaces from String
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In this tutorial, we will learn about how to create a program in C that will ask from user to enter any number (any real or floating-point number) to round it off to its nearest integer. For example, if user has provided 23.43 as input, then the program will output its nearest integer value that will be 23. Let's take a look at the program:

// Write a program in C, to read following numbers // from your keyboard, round them to their nearest // integer value and print the result in integer format // For example, 37.5 to 38, 50.123 to 50, -25.5649 to -24 // -56.8877 to -55, and 123.0 to 123 etc. // -----------codescracker.com----------- #include<stdio.h> #include<conio.h> int main() { float num; int tempCheck, roundNum, tempNum; printf("Enter the number: "); scanf("%f", &num); if(num>0) { tempNum = num*10; tempCheck = tempNum%10; if(tempCheck>=5) { roundNum = num; roundNum++; } else { roundNum = num; } printf("\nWhole number after rounding off the given real number = %d", roundNum); } else if(num<0) { num = -(num); tempNum = num*10; tempCheck = tempNum%10; if(tempCheck>=5) { roundNum = num; roundNum--; } else { roundNum = num; } printf("\nWhole number after rounding off the given real number = -%d", roundNum); } else { printf("\nThe given number is 0"); } getch(); return 0; }

As the above program was written under **Code::Blocks** IDE, therefore after successful build and run, you will get the
similar output as given below. This is the first snapshot of the sample run:

Now supply any real number say **37.5** and press `ENTER`

key to see the nearest integer (whole number) value of the
given real number:

Here is another sample run of the above program, this time let's suppose user has provided the real number say **-25.56** as
input:

Here are the list of some main steps used in above program:

- Receive any real-number as input
- Now Use two
**if**statement to round it off. One if user has provided a real number which is positive. Second when user has supplied the real number which is negative - Now if the given number is a positive number, then multiply the number with 10 and initialize
it to a variable say
**tempNum**. Then find the remainder of**tempNum**(by dividing with 10) and initialize it to another variable say**tempCheck**. Check whether**tempCheck**variable holds the value which is greater than 5 or not. If it is, then initialize the value of**num**to another variable say**roundNum**and increment it by 1. Then at last print the value of**roundNum**which will be the nearest integer value of the given number (by user at run-time) - And if the given number is a negative number, then first make it a positive number just by
multiplying the number with
**minus (-)**operator. Do the same steps as done in case of positive number except that, this time we have to decrement the value of**roundNum**, as in case of negative number greater the number means smaller the value. That is 34 is greater than 33, but -34 is less than -33 - For example, if user has supplied 33.45 as input
- Then program flow goes inside the first
**if**block as**33.45**is greater than 0 - Inside the
**if**block,**num*10**or**33.45*10**or**334.5**will be initialized to**tempNum**and**tempNum%10**or**334.5%10**or**4**will be initialized to**tempCheck** **Note**- Here we have multiplied the number with 10 and then applied the modulous operator (%) to make the first digit present after decimal will come before decimal. So that we becomes able to check the number by using modulous operator that whether the number is greater than or equal to 5 or not (that present after decimal). That is if the number is greater than or equal to 5, then we have to increment the value and print it as nearest integer of given number, and if the number is less than 5, then print the number as it is (without having decimal part)- Now come to the example, as
**tempCheck**holds**4**which is less than 5, therefore the program flow goes inside the**else**block and**num**will be initialized to**roundNum**. And print the value of**roundNum** - And if user has provided
**-34.67**as input, then as the number is less than 0, then the program flow goes inside the**else if**block - The number is multiplied with minus operator (-) and initialized to the number itself, that is
**-(num)**or**-(-34.67)**or**34.67**will be initialized to**num**. And**num*10**or**34.67*10**or**346.7**will be initialized to**tempNum**,**tempNum%10**or**346.7%10**or**6**will be initialized to**tempCheck**. - As the
**tempCheck**variable holds the value which is greater than 5, therefore program flow goes inside the**if**block and**num**will be initialized to**roundNum**and the value gets decremented. Finally print the value which will be 33 as output