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C Program to Print All Numbers in a Range

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Print all numbers in a range

C programs to print all the numbers in a range have been shown here. Both of the iterative and recursive approaches have been covered.






1. Algorithm to Print All numbers in a range


1. Take input of two numbers n1, n2 as range limit.

2. Set another variable i=n1

3. Iterate i from n1 to n2 by incrementing 1

4. Print value of i in each iteration




2. Pseudocode to Print All numbers in a range


Input : Two integer numbers $n_1, n_2$

Output : All the integer numbers from $n_1$ to $n_2$

1. Procedure printAll($n_1$, $n_2$):

2. $i\leftarrow n_1$

3. Repeat until $i > n_2$

4. Print $i$

5. $i \leftarrow i+1$

6. End Procedure





3. Time complexity to Print All numbers in a range


Time Complexity: O(n)

Here, $n$ is the no. of terms in the given range.





4. C Program & Output to Print All Integer numbers in a range using Iteration

Code has been copied
/*********************************************
            alphabetacoder.com
 C program to print all integer numbers in 
 a given range using iterative approach
**********************************************/

#include <stdio.h>

int main() {
    // declare variables
    int n1, n2, i;
    //take input of the ranges
    printf("Enter the lower limit = ");
    scanf("%d", & n1);
    printf("Enter the upper limit = ");
    scanf("%d", & n2);

    // iterate from n1 to n2 and print the numbers
    printf("Numbers in the range: ");
    for (i = n1; i <= n2; i++)
        printf("%d ", i);
    
    return 0;
}

Output

Case 1:

Enter the lower limit = -5

Enter the upper limit = 5

Numbers in the range: -5 -4 -3 -2 -1 0 1 2 3 4 5


Case 2:

Enter the lower limit = 13

Enter the upper limit = 30

Numbers in the range: 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30




5. C Program & Output to Print All Integer numbers in a range using Recursion

Code has been copied
/**********************************************
            alphabetacoder.com
 C program to print all integer numbers in
 a given range using a recursive approach
*********************************************/

#include <stdio.h>
 // recursive function
void printNumbers(int n1, int n2) {
    //condition for calling
    if (n2 > n1)
        printNumbers(n1, n2 - 1);
    // print current numbers
    printf("%d ", n2);
}

int main() {
    // declare variables
    int n1, n2, i;
    //take input of the ranges
    printf("Enter the lower limit = ");
    scanf("%d", & n1);
    printf("Enter the upper limit = ");
    scanf("%d", & n2);

    printf("Numbers in the range: ");
    // call the recursive function to print
    // all the integer numbers in a range
    printNumbers(n1, n2);

    return 0;
}

Output

Case 1:

Enter the lower limit = 0

Enter the upper limit = 5

Numbers in the range: 0 1 2 3 4 5


Case 2:

Enter the lower limit = 7

Enter the upper limit = 15

Numbers in the range: 7 8 9 10 11 12 13 14 15




6. C Program & Output to Print All Float numbers with specific interval in a range using Iteration

Code has been copied
/********************************************
            alphabetacoder.com
 C program to print all float numbers with
 specific interval in a given range
*********************************************/

#include <stdio.h>

int main() {
    // declare variables
    double n1, n2, in, i;
    //take input of the ranges
    printf("Enter the lower limit = ");
    scanf("%lf", & n1);
    printf("Enter the upper limit = ");
    scanf("%lf", & n2);
    
    // take input of step
    printf("Enter the value of interval = ");
    scanf("%lf", & in);

    printf("Numbers in the range: ");
    // dislay all numbers
    for (i = n1; i <= n2; i+= in)
        printf("%lf ", i);
    
    return 0;
}

Output

Case 1:

Enter the lower limit = 10

Enter the upper limit = 15

Enter the value of interval = 0.25

Numbers in the range: 10.000000 10.250000 10.500000 10.750000 11.000000 11.250000 11.500000 11.750000 12.000000 12.250000 12.500000 12.750000 13.000000 13.250000 13.500000 13.750000 14.000000 14.250000 14.500000 14.750000 15.000000


Case 2:

Enter the lower limit = 1

Enter the upper limit = 3

Enter the value of interval = 0.33

Numbers in the range: 1.000000 1.330000 1.660000 1.990000 2.320000 2.650000 2.980000




7. C Program & Output to Print All Float numbers with specific interval in a range using Recursion

Code has been copied
/****************************************************
            	alphabetacoder.com
 C program to print all float numbers with specific
 interval in a given range using recursive approach
*****************************************************/

#include <stdio.h>
 // recursive function
void printNumbers(double n1, double n2, double in) {
    //condition for calling
    if (n2 > n1)
        printNumbers(n1, n2 - in, in);
    // print current number
    printf("%lf ", n2);
}

int main() {
    // declare variables
    double n1, n2, in;
    //take input of the ranges
    printf("Enter the lower limit = ");
    scanf("%lf", & n1);
    printf("Enter the upper limit = ");
    scanf("%lf", & n2);
    
    // take input of step
    printf("Enter the value of interval = ");
    scanf("%lf", & in);

    printf("Numbers in the range: ");
    // call the recursive function to print
    // all the float numbers in input range
    printNumbers(n1, n2, in);

    return 0;
}

Output

Case 1:

Enter the lower limit = 10

Enter the upper limit = 15

Enter the value of interval = 0.25

Numbers in the range: 10.000000 10.250000 10.500000 10.750000 11.000000 11.250000 11.500000 11.750000 12.000000 12.250000 12.500000 12.750000 13.000000 13.250000 13.500000 13.750000 14.000000 14.250000 14.500000 14.750000 15.000000


Case 2:

Enter the lower limit = 1

Enter the upper limit = 2

Enter the value of interval = 0.1

Numbers in the range: 1.000000 1.100000 1.200000 1.300000 1.400000 1.500000 1.600000 1.700000 1.800000 1.900000 2.000000




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