- 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
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- All Test List

# C Program for Linear Search

In this article, you will learn and get code about searching of a number or an element from given array using linear search technique. But before going through the program, if you want to check out the algorithm used for linear search, then refer to Linear Search.

## Linear Search in C

Linear search is an easiest way to search an element from an array. It is also easy to learn. Let's first
create a program on it. The question is *Write a Program in C that asks from user to enter any 10 array elements, and
then ask to enter a number to search from the given array.* The answer to this question is:

#include<stdio.h> #include<conio.h> int main() { int arr[10], i, num, pos; printf("Enter any 10 Numbers: "); for(i=0; i<10; i++) scanf("%d", &arr[i]); printf("\nEnter a Number to Search: "); scanf("%d", &num); for(i=0; i<10; i++) { if(arr[i]==num) { pos=i; break; } } printf("\nFound at Index No.%d", pos); getch(); return 0; }

This program was build and run under **Code::Blocks** IDE. Here is its sample run:

Now supply any 10 numbers say **1, 2, 3, 4, 5, 6, 7, 8, 9, 10** and then enter a number say **7** to search.
On pressing the `ENTER`

. Here is the output produced:

As you can see from the above code, the number (stored in **num**) gets compared with each and every number one by one. That is,
first number (number at **0 ^{th}** index) gets compared to

**num**. If found, then initial the index to a variable say

**pos**and with the help of break keyword, exit the loop. Print the value of

**pos**as number's index. Otherwise check for the number at next index. Continue the process until the number gets found.

**Note** - Previous program has two limitations. The first one is, if user enters a number that does not
available in the list. And the second one is, if user enters a number that present more than one time in the list
or array. To overcome this problem, we have created another program.

## Linear Search with Duplicates in C

This program find and prints index number at which the number is available. If the given number present in the given array in repeated order. Then this program also prints its all the indexes where it is available.

#include<stdio.h> #include<conio.h> int main() { int arr[50], size, i, num, arrTemp[50], j=0, count=0; printf("Enter Array Size: "); scanf("%d", &size); printf("\nEnter any %d Array Elements: ", size); for(i=0; i<size; i++) scanf("%d", &arr[i]); printf("\nEnter a Number to Search: "); scanf("%d", &num); for(i=0; i<size; i++) { if(arr[i]==num) { arrTemp[j] = i; j++; count++; } } if(count>0) { printf("\nNumber Found at Index No."); size = count; for(i=0; i<size; i++) printf("%d ", arrTemp[i]); } else printf("\nNumber does not Found!"); getch(); return 0; }

Let's suppose user has entered array size as **10** and its 10 elements as **1, 2, 3, 4, 5, 4, 6, 4, 7, 4**.
And **4** is the number to be search. Therefore here is its sample output you will see:

Here the main logic used is:

- If number gets matched. Then just initialize the current index number to another array say
**arrTemp[]** - Increment a variable say
**count**every time, initializing the index number to the array**arrTemp[]** - The array
**arrTemp[]**holds index number(s) where the number is available and the variable**count**holds the size of**arrTemp[]**

#### Same Program in Other Languages

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