for loop

The for loop in C language is also used to iterate the statement or a part of the program several times, like while and do-while loop

But, we can initialize and increment or decrement the variable also at the time of checking the condition in for loop.
Unlike do while loop, the condition or expression in for loop is given before the statement, so it may execute the statement 0 or more times.

When use for loop

For loop is better if number of iteration is known to the programmer.
Syntax of for loop 

for(initialization;condition;incr/decr)  {  
   //code to be executed  
    }

Flowchart of for loop


Example of for loop 

#include <stdio.h>      
void main( ) {      
int i = 0;         
for(i = 1;i<= 12; i++) {    
printf("%d ",i);    
 }       
 }      
Output:   1    2    3    4    5     6    7      8    9    10   11   12
Print table for the given number using C for loop 
#include <stdio.h>      
void main( ) {    
int i = 1,number = 0;    
printf("Enter a number: ");  
scanf("%d",&number);  
for(i = 1; i<= 6; i++) {    
printf("%d ",(number*i));  
 }   
 }         
Output:
Enter a number: 4
   4    8    12    16    20     24

Infinitive for loop

If you don't initialize any variable, check condition and increment or decrement variable in for loop, it is known as infinitive for loop.
In other words, if you place 2 semicolons in for loop, it is known as infinitive for loop. 
for(;;)  {  
printf("infinitive for loop example by Catchmecoder");  
  }
If you run this program, you will see above statement infinite times.