What is a looping structure? Explain for loop with examples.

A looping structure is used to execute a block of code repeatedly based on a certain condition. It allows you to repeat operations without needing to write the same code multiple times. Looping structures help in automating repetitive tasks efficiently.

A for loop is generally used when the number of iterations is known beforehand. It is structured with three components: initialization, condition, and update expression. The loop runs as long as the condition is true.

Syntax:

for(initialization; condition; update) {
// code to execute
}
  • Initialization: Sets the starting point (often a variable).
  • Condition: Determines whether the loop should continue.
  • Update: Alters the loop control variable after each iteration.

Example:

#include <stdio.h>
int main() {
for(int i = 0; i < 5; i++) {
printf(“This is iteration %d\n”, i);
}
return 0;
}

Output:

This is iteration 0
This is iteration 1
This is iteration 2
This is iteration 3
This is iteration 4

Related Questions:

  1. Explain while and do-while loops with examples.
  2. Differentiate between for loop and while loop.
  3. Differentiate between while loop and do-while loop.
  4. What will be the output of the following code?
  5. What will be the output of the following code?
  6. Find errors in the following code.
  7. Convert the following for loop into a while loop.
  8. Explain different types of loops in C with examples.
  9. Why is an escape sequence used? Explain with examples.
  10. What is the purpose of the printf() function? Explain with an example.
  11. Differentiate between printf() and scanf() functions.
  12. Evaluate the following expressions:
  13. What will be the output of the following program?
  14. What will be the output of the following program?
  15. Describe how basic and compound assignment operators are used.
  16. Describe the functions of the following operators:
  17. Write a program that reads three numbers and prints their sum, product, and average.
  18. Write a program that reads temperature in Celsius, converts it into Fahrenheit, and prints it on the screen.
  19. Write a program that reads the length and width of a rectangle and prints its area.
  20. Write a program that reads the length of one side of a cube and prints its volume.