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For Versus While

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  • Difficulty Level : Easy
  • Last Updated : 17 Jun, 2022
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Question: Is there any example for which the following two loops will not work the same way?  

C




/*Program 1 --> For loop*/
for (<init - stmnt>;<boolean - expr>;<incr - stmnt>) {
<body-statements>
}
 
/*Program 2 --> While loop*/
<init - stmnt>;
while (<boolean - expr>) {
<body-statements>
<incr-stmnt>
}

Solution: If the body-statements contains continue, then the two programs will work in different ways See the below examples: Program 1 will print “loop” 3 times but Program 2 will go in an infinite loop. 

Example: using “for” loop
Syntax:

    for(initialization ; condition ; increment/decrement)
    {  
        //statement 
    }      

C




#include <stdio.h>
 
int main()
{
    int  sum=0, i;
    for(i=1;i<=5;i++)
    {
        sum=sum+i;
    }
     
      printf("SUM = %d" , sum);
     
      return 0;
}

Output

SUM = 15

Example: using the “while” loop
Syntax: 

    while(condition)
    {  
        //code for execution
    }

C




// Example:
 
#include<stdio.h>
 
int main()
{
    int no=1, sum=0;
   
    while(no<=5)
    {
        sum=sum+no;
        no++;
    }
         
      printf("SUM = %d" , sum);
 
      return 0;
}

Output

SUM = 15

Please write comments if you want to add more solutions to the above question.


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