C Program to print Even numbers till N

Description

Get input n and print even numbers till n.
Input:
7
Output:
2 4 6

Solution

#include<stdio.h>
int main()
{
	int n,i;
	printf("Enter a number:");
	scanf("%d",&n);
	printf("Even numbers till %d:\n",n);
	for(i=0;i<=n;i=i+2)
	{
		printf("%d ",i);
	}
	return 0;
}

Explanation

Instruction(s) inside the for block{} are executed repeatedly till  the second expression (i<=n) is true.

Here i is initialized to 2 and incremented by 2 for each iteration, instructions inside the for block are executed unless i becomes greater than n.  so value of i will be printed like 2 4 6 .... (n-1) or n using printf statement.

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