Understanding the Nested For in C Programming

---

C supports nesting of loops in C. Nesting of loops is the feature in C that allows the looping of statements inside another loop. Let's observe an example of nesting loops in C. Any number of loops can be defined inside another loop, i.e., there is no restriction for defining any number of loops. The nesting level can be defined at n times. You can define any type of loop inside another loop; for example, you can define 'while' loop inside a 'for' loop.

Syntax:
   for( initial ; Condition ; increment / decrement )  // Outer Loop Statements
   {
            for( initial ; Condition ; increment / decrement )  // Inner Loop Statements
            {
                       . . . .
            }
   }

This program is written in C language and uses nested for loops to print two different patterns of asterisks (*).

The first for loop, with the loop variable "i" starts at 0 and runs for 5 iterations. Within this for loop, there is another for loop, with the loop variable "j", which also starts at 0 and runs for 5 iterations. The inner for loop prints an asterisk (*) on each iteration, so it will print 5 asterisks in total during each iteration of the outer for loop. This creates a pattern of 5 rows of 5 asterisks each.

Then a line of separator is added to distinguish the two different patterns

The second set of nested loops starts with i = 1 and runs for 5 iterations. Within this for loop, there is another for loop, with the loop variable "j" which starts at 1 and runs for i iterations. The inner for loop prints an asterisk (*) on each iteration, so it will print i asterisks in total during each iteration of the outer for loop. This creates a pattern of 5 rows of asterisks, with the first row having 1 asterisk, the second row having 2 asterisks, and so on, up to the fifth row which has 5 asterisks.

In the end, the main function returns 0 to indicate successful execution of the program.

---

Source Code

//Nested For Loop
 
/*
    *****
    *****
    *****
    *****
    *****
 
    *
    **
    ***
    ****
    *****
*/
 
#include<stdio.h>
int main()
{
    int i,j;
    for(i=0;i<5;i++)
    {
        for(j=0;j<5;j++)
        {
            printf("*");
        }
        printf("\n");
    }
    printf("\n----------------------------\n");
 
    for(i=1;i<=5;i++)
    {
        for(j=1;j<=i;j++)
        {
            printf("*");
        }
        printf("\n");
    }
    return 0;
}
 

To download raw file Click Here

Output

* * * * *
* * * * *
* * * * *
* * * * *
* * * * *

----------------------------
*
* *
* * *
* * * *
* * * * *

Programming Exercises

1. Factors of a Number

Write a program to find the factor of the given number.

2. Prime Number

Write a program to find whether the given number is prime or not.

3. Armstrong Number

Write a program to find the given number is Armstrong number or not.

Example:
153

1³ = 1
5³ = 125
3³ = 27

1 + 125 + 27 = 153

4. Armstrong Numbers Between 1 to 10000

Write a program to print the Armstrong numbers between 1 to 10000.

5. Count Odd and Even Numbers

Write a program to count and print the number of odd and even numbers.

Example:
[2, 85, 6, 77, 5]

Enter the limit: 5
Enter the value: 10
Enter the value: 25
Enter the value: 65
Enter the value: 12
Enter the value: 45

Even: 2
Odd: 3

6. Reverse of a Number

Write a program to find the reverse of an n-digit number using a while loop.
Clue: Use % and // operators.

7. Decimal to Binary

Write a program to find the binary number from a given decimal number.

8. Binary to Decimal

Write a program to find the decimal number from a given binary number.

9. Factorial

Write a program to find the factorial of the given number.

Enter the number: 5
Factorial of 5 is: 120

10. Fibonacci Series

Write a program to find the Fibonacci series of the given number.

Enter the limit: 8
0
1
1
2
3
5
8
13

11. Perfect Number

Write a program to find whether the given number is a perfect number.

Example:
6

Factors: 1, 2, 3
1 + 2 + 3 = 6

12. Perfect Numbers Between 1 and 1000

Write a program to print the perfect numbers between 1 and 1000.

13. Strong Number

Write a program to find whether the given number is a strong number.

Example:
145

Digits:
1
4
5

Factorials:
1! = 1
4! = 24
5! = 120

Sum:
1 + 24 + 120 = 145

145 is a Strong Number

14. Power of a Number

Two numbers are entered through the keyboard. Write a program to find the value of one number raised to the power of another.

Example:
Enter the Base: 2
Enter the Power: 3
Clue: 2 × 2 × 2 = 8

Result: 8

• Previous
• Next

---

List of Programs

---

• C Introduction
• Hello World
• Basic Addition
• Data Types in C
• Variables and Literals in C
• Arithmetic Operator in C
• Example for Arithmetic Operator in C
• Assignment Operators in C Program
• Relational Operators in C Program
• Logical Operators in C Program
• Increment and Decrement Operators in C Program
• Bitwise Operators in C Program
• if Statement in C Program
• if else Statement in C Program
• else if Statement in C Program
• Nested if Statement in C Program
• Switch Statement in C Program
• Conditional Operator Statement in C Program
• School Management in C Program
• Library Management in C Program
• Find the given number is odd or even in C Program
• Check the given number is vowels or not in C Program
• Check the given number is Armstrong or not in C Program
• Hotel Management in C Program
• Goto Statement in C Program
• Hotel Management using goto in C Program
• While Loop in C Program
• Do while Loop in C Program
• For Loop in C Program
• Nested For Loop in C Program
• Break and Continue Statement in C Program
• ASCII Values in C Program
• Single Dimensional Array in C Program
• 2D Array in C Program
• String Function in C Program
• Math Function in C Program
• Function in C Program
• No Return Without Argument Function in C Program
• No Return With Argument Function in C Program
• Return Without Argument Function in C Program
• Return With Argument Function in C Program
• Recursion Function in C Program
• Call by Reference Function in C Program
• Local Variable in C Program
• Global Variable in C Program
• Static Variable in C Program
• Enumeration or enum in C Program
• Single pointer in C Program
• Double & Triple pointer in C Program
• Pointer Arithmetic in C Program
• Pointer Handle Array Values in C Program
• Void * Pointer in C Program
• Malloc Function in C Program
• Calloc Function in C Program
• Realloc Function in C Program
• Free Function in C Program
• Dangling Pointer in C Program
• Using Const in Pointer in C Program
• Structure in C Program
• Local and Global Structure in C Program
• Typedef in C Program
• Initializing & Accessing the Structure Members in C Program
• Access members of structure using pointer in C Program
• Structure as function arguments in C Program
• Array of Objects Structure in C Program
• Union in C Program
• Shop Management using Structure and Union in C Program
• Input and output functions in C Program
• Preprocessor Directives in C Program
• Read File in C Program
• Write File in C Program
• Multiplication tables in C Program
• Total no of even and odd numbers in an array in C Program
• Count Alphabets Digits and Special Characters in a String in C Program
• Convert string to uppercase in C Program
• Convert string to lowercase in C Program
• Display Fibonacci Sequence in C Program
• Greatest of n numbers in an array in C Program

Sample Programs

---

Switch Case in C

• Present Elevator Position
• Check Vowel or Consonent
• Hotel Management using Swtich Case

---

Conditional Operators in C

• Find Greatest Number
• Check Find Smallest Number
• Check Number Equal or Not
• Check Char. Vowel or Consonent
• Check Character Capital or Small

---

Goto Statement in C

• Consecutive Numbers
• Print Text Using Goto
• Print Odd Numbers
• Printing Tables
• Printing Sum of Values
• Printing Reverse Table
• Print Factorial in C

---

While Loop Example Programs

• Print numbers using While Loop
• Armstrong Number using While Loop
• Print Odd and Even numbers
• Print Positive and Negative numbers
• Print Prime or Composite Number Upto Limit
• Print Prime or Composite Number
• Reverse table using While Loop
• Print table using While Loop
• Covert Decimal to Binary using While Loop

---

Looping Statements in C

For Loop Example Programs

• Print Value upto limit
• Print Number upto limit
• Armstrong Number using For Loop
• Square Pattern using For Loop
• Flag Pattern using For Loop
• Diamond Pattern using For Loop
• Triangle Facing Downward using For Loop
• Triangle Facing upside using For Loop
• Right Angle Triangle facing left
• Right Angle Triangle facing right
• Reverse Number using For Loop
• Prime Number using For Loop
• Print Number divisible by 7
• Print tables using For Loop
• Reverse tables using For Loop
• Separate odd and even numbers
• Check prime or composite number
• Separate positive and negative number
• For Loop Patterns
• Square Pattern Outline using For Loop
• Triangle Outline Pattern
• Diamond Pattern Outline

---

Array Examples in C

One Dimensional Array

• Add Elements to the Array
• Arrange array elements in Ascending
• Arrange array elements in Descending
• Insert an element using Array
• Update an element using Array
• Delete an element using Array
• Interchange an element using Array
• Reverse an element using Array
• Odd or Even Number using Array
• Positive and Negative Numbers using Array
• Armstrong Number 100 to 999
• Greatest Number using Array
• Smallest Number using Array
• Print values divisible by 7 using Array
• Convert binary to decimal using Array
• Convert decimal to binary using Array
• Convert decimal to octal using Array

---

Two Dimensional Array in C

• Print Two Dimensional Array
• Array Addition in Two-Dimenional Array
• Array Subtraction in Two-Dimensional Array
• Array Multiplication using Array
• Lower Triangular Matrix using Array
• Upper Triangluar Matrix using Array
• Print Unit Matrix using Array
• Check and Print Unit Matrix

---

String Example Programs in C

• Print text using String
• String Example
• String Comparison in C
• String Concatenation in C
• String Copy Example in C
• Convert Uppercase to Lowercase
• Remove Duplicate String
• Reverse text using String
• Toggle Case using String
• Conver text into Capital or Small
• Convert Lowercase to Uppercase
• Convert text into Ascending Order using
• Capitalising the first letter
• Check given strings Equal or Not
• Copy String using Predefined Function
• String Length using Predefined Function
• String Length without Predefined Function
• Uppercase to Lowercase using Predefined Function
• Check Palindrome or Not

---

Functions Example Programs in C

• Addition using return type and arguments
• Print marks using return type & arguments
• Function with no return and with arguments in c
• Print tables without arguments

---

Learn All in Tamil © Designed & Developed By Tutor Joes | Privacy Policy | Terms & Conditions