C Program To Find Smallest Number In An Array (3 Different Way)

In this article, we are going to write a C program to find Smallest Number In An Array.

We will make this program in the following way -:

  • C Program To Find Smallest Number In An Array Using Recursion
  • C Program To Find Smallest Number In An Array Using Pointer
  • C Program To Find the 2nd Smallest Number In An Array

To make this program, we will use the following concept which is given below. If you do not know about these topics well, then you may not understand this program, so you should know about them in detail from the link given below.

Now without wasting time let’s start programming.

C Program To Find Smallest Number In An Array

C Program To Find Smallest Number In An Array Using Recursion

Algorithm -:

  1. Program Start
  2. Variable Declaration
  3. Input Values
  4. Calling Recursive Function to find Smallest Number
  5. Display Smallest Number
  6. Program End

Program -:

//C Program To Find Smallest Number In An Array Using Recursion 

#include<stdio.h>
int smallest(int a[],int n);

void main()
{
    int i,j,n,a[20];
    printf("enter a Number :");
    scanf("%d",&n);
    printf("enter values : ");

    for(i=0;i<n;i++)
    {
        scanf("%d",&a[i]);
    }

    printf("\nSmallest Number is : %d",smallest(a,n));
}
int smallest(int a[],int n)
{
    int min;

    if(n==1)
        return a[0];

    else {
        min=smallest(a,n-1);

        if(min<a[n-1])
            return min;
        else

            return a[n-1];
    }

}

Output -:

Enter a Number 5
Enter values : 10
28
8
19
81

Smallest Number is : 8

C Program To Find Smallest Number In An Array Using Pointer

Algorithm -:

  1. Program Start
  2. Variable Declaration
  3. Input number
  4. Check the condition
  5. Display Smallest Number
  6. Program End

Program -:

//C Program To Find Smallest Number In An Array Using Pointer

#include<stdio.h>
void  main()
{
    int i,*ptr, n,a[100],small;

    printf("Enter How many number you want?:\n") ;
    scanf("%d",&n) ;

    printf("Enter %d numbers\n",n) ;
    for(i=0;i<n;i++)
    {
        scanf("%d",&a[i]) ;
    }
    ptr = &a[0];
    small= *ptr;
    for(i=0;i<n;i++,*ptr++)
    {
        if(*ptr<small)
        {
            small=*ptr;
        }
    }
    printf("Smallest Number is : %d",small);
}

Output -:

Enter How many number you want?
5
Enter 5 number
21
34
3
27
32

Smallest Number is : 3

C Program To Find the 2nd Smallest Number In An Array

Program -:

//C Program To Find the 2nd Smallest Number In An Array

#include<stdio.h>
void  main()
{
    int i,n,array[100],smallest, secsmallest;

    printf("Enter How many number you want?:\n") ;
    scanf("%d",&n) ;

    printf("Enter %d Values \n",n) ;
    for(i=0;i<n;i++)
    {
        scanf("%d",&array[i]) ;
    }
   if (array[0] < array[1]) {
        smallest = array[0];
        secsmallest = array[1];
    }
    else {
      smallest = array[1];
      secsmallest = array[0];
    }
    for (i = 2; i < n; i++) {
        if (array[i] < smallest) {
        secsmallest = smallest;
        smallest = array[i];
        }
        else if (array[i] < secsmallest) {
            secsmallest = array[i];
        }
    }
    printf(" \nSecond Smallest Element is %d", secsmallest);
}

Output -:

Enter How many number you want?
5
Enter 5 number
3
14
9
23
32

Second Smallest Element is : 9

Conclusion

In this article, we have created all the following programs -:

  • C Program To Find Smallest Number In An Array Using Recursion
  • C Program To Find Smallest Number In An Array Using Pointer
  • C Program To Find the 2nd Smallest Number In An Array

If you have difficulty to understand any program or have any doubts or questions, then tell me in the comment below.

Jeetu Sahu is A Web Developer | Computer Engineer | Passionate about Coding, Competitive Programming, and Blogging

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