For Loop in C

A for loop in C is a control flow statement that allows code to be executed repeatedly based on a condition. The loop is particularly useful for iterating a fixed number of times or over a range of values.

The syntax of a for loop in C is as follows:
for (initialization; condition; increment) {
// Code to be executed repeatedly
}

• Initialization : This is executed only once, at the beginning of the loop. It usually initializes one or more loop counters.
• Condition : This expression is evaluated before each iteration of the loop. If the condition is true, the loop body is executed. If it is false, the loop terminates.
• Increment : This is executed after each iteration of the loop body. It usually increments or decrements the loop counter.

Here is a simple example of a for loop in C that prints numbers from 1 to 10 :

#include <stdio.h>
main() 
{
	int i;
    for (i = 1; i <= 10; i++)
    {
        printf("%d ", i);
    }
}

• Explanation of the Example :
• Initialization : int i = 1; initializes the loop counter i to 1.
• Condition : i <= 10; checks if i is less than or equal to 10. If true, the loop body executes.
• Increment : i++ increments the loop counter i by 1 after each iteration. During each iteration, printf("%d ", i); prints the current value of i. The loop continues until the condition i <= 10 is false.

#include<stdio.h>
main()
{
	int n,i,f=1;
	printf("Enter a no:");
	scanf("%d",&n);
	for (i=1; i<=n; i++)
	{
		f=f*i;
	}
	printf("The factorial is=%d",f);
}

#include<stdio.h>
main()
{
	int i,r,n,s=0;
	printf("enter the range:");
	scanf("%d",&r);
	for(i=1; i<=r; i++)
	{
		scanf("%d",&n);
		s=s+n;
	}
	printf("Sum=%d",s);
	
}

#include<stdio.h>
main()
{
	int i,a=0,b=1,c;
	printf("%d ",a);
	printf("%d ",b);
	for(i=1; i<=10; i++)
	{
		c=a+b;
     	printf("%d ",c);
	    a=b;
	    b=c;
}
}

The for loop is a powerful and flexible tool in C for iterating over a range of values or executing code a fixed number of times. Understanding its syntax and variations allows you to handle many programming tasks efficiently.