Looping

In computer programming, a loop is a sequence of commands or statements that are repeated many times.

Looping statements in C language

C language provides following looping statements:

• for statement
• while statement
• do…while statement

Let us learn C programming Looping concept by executing following programs.

C programs based on for loop

• C program to print 1 to 10 numbers using for loop.

• C program to print 10 to 1 numbers using for loop.

• C program to find the sum of first 100 natural numbers.

• C program to check whether entered number is odd or even.
• To print Fibonacci Series. (0, 1, 1, 2, 3, 5, ....).
• Printing Swastik Pattern using for loop.
• To print A to Z using for loop.
• To print Z to A using for loop.
• To print sum of series 1 + 1/2 + 1/3 + 1/4 + ....N

C programs based on while loop

• Print A to Z using while loop.

• Print 10 to 20 numbers using while loop.

• Program to count no. of digits in a given number.
• Calculate the power of an integer without use of inbuilt math function.
• Program to count words in a given string.
• GCD of two numbers.

C programs based on do…while loop

• C program to print Z to A using do..while loop.
• C program to print series 1 3 5 7... 19 using do..while loop.

• Sum of all numbers between 100 and 200 using do while loop
• Program to display MENU using do..while.

Sample Program based on Looping concept

C program to print 1 to 10 numbers using for loop. #include<stdio.h> int main() {   int i;   for(i=1; i<=10; i++)   {      printf("%d ", i);   }   return 0; } Output of program 1 2 3 4 5 6 7 8 9 10

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