For Loop in C
1.What is for loop in C ?
Ans: The for loop in C Language provides a functionality/feature to repeat a set of statements a defined number of times. The for loop is in itself a form of an entry-controlled loop.
Simple Explanation :
The working of for loop is also same. The for loop is a group of initialization of a value to variable , condition and update means increment or decrement of a value.
Working of for loop :
for(initialization; check/test expression; updation)
{
// body consisting of multiple statements
}
Example:
1. Write a C program to print numbers 1 to n numbers.
#include<stdio.h> // Include the standard input/output header file.
int main ( )
{
int num,i; //Declare variables for loop and to take user input
printf("Enter the number till you want to print ");
scanf("%d",&num);
for (i=0;i<=num;i++) // Start a for loop
{
printf("%d\n",i); // Print the number.
}
}
Output :
2. Write a C program to display the cube of the number up to an integer.
#include <stdio.h> // Include the standard input/output header file.
int main()
{
int i, num; // Declare variables 'i' for loop counter and 'num' for user input.
printf("Input number of terms : "); // Print a message to prompt user input.
scanf("%d", &num); // Read the value of 'num' from the user.
for (i = 1; i <= num; i++) // Start a for loop
{
printf("Number is : %d and cube of the %d is :%d \n", i, i, (i * i * i)); // Print the number, its cube, and message.
}
}
Output :
3.Write a program in C to display the multiplication table
for a given integer.
int main()
{
int j, n; // Declare variables 'j' for loop counter and 'n' for user input.
printf("Input the number (Table to be calculated) : "); // Print a message to prompt user input.
scanf("%d", &n); // Read the value of 'n' from the user.
printf("\n"); // Print a newline for formatting.
for (j = 1; j <= 10; j++) // Start a for loop to calculate the table up to 10.
{
printf("%d X %d = %d \n", n, j, n * j); // Print the multiplication expression and result.
}
}
Output :
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