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 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 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 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 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