- 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 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 Program for Linear Search

In this article, you will learn and get code for searching for a number or an element in a given array using the 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 the easiest way to search for an element in an array. It is also easy to learn. Let's first create a program for it. The question is: "Write a program in C that asks the user to enter any 10 array elements and then asks them 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 built and runs in the Code::Blocks IDE. Here is its sample run:

Now supply any 10 numbers, say 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10, and then enter a number, say 7, to search. When you press the ENTER key,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, the first number (the number at the
0^{th} index) gets compared to num. If found, then initialize the index to a variable, say pos, and with the help of the break keyword, exit the loop.
Print the value of pos as the number's index. Otherwise, check for the number at the next index. Continue the process until the number is found.

**Note**: The previous program had two limitations. The first one is if the user enters a number that is not available in the list. The second is if the user
enters a number that appears multiple times in the list or array. To overcome this problem, we have created another program.

## Linear Search with Duplicates in C

This program finds and prints the index number at which the number is available. If the given number is present in the given array in repeated order. The program then prints all of the indexes that are 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 the user has entered the array size as 10 and its 10 elements as 1, 2, 3, 4, 5, 4, 6, 4, 7, and 4. And the number to be found is 4. Therefore, here is its sample output, which you will see:

Here the main logic used is:

- If the numbers coincide. Simply copy the current index number to another array, say arrTemp [].
- Each time, increment a variable, say count, by setting the index number in the array arrTemp []
- The array arrTemp[] holds index number(s) where the number is available, and the variable count holds the size of arrTemp[].

#### The same program in different languages

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