for loop: When it is desired to do initialization, condition check and increment/decrement in a single statement ofan iterative loop, it is recommended to use 'for' loop.
Syntax:
for(initialization;condition;increment/decrement){//block of statementsincrement or decrement}
Program: Program to illustrate for loop
#include<stdio.h>
int main() {int i;for (i = 1; i <= 5; i++) {//print the number
printf("n %d", i);}return 0;
}
Output:12345
Explanation:
The loop repeats for 5 times and prints value of 'i' each time. 'i' increases by 1 for every cycle of loop.while loop: When it is not necessary to do initialization, condition check and increment/decrement in a singlestatement of an iterative loop, while loop could be used. In while loop statement, only condition statement ispresent.
Syntax:
#include<stdio.h>
int main() {
int i = 0, flag = 0;int a[10] = { 0, 1, 4, 6, 89, 54, 78, 25, 635, 500 };//This loop is repeated until the condition is false.while (flag == 0) {if (a[i] == 54) {//as element is found, flag = 1,the loop terminatesflag = 1;}else {i++;}}printf("Element found at %d th location", i);return 0;}
Output:
Element found at 5th locationExplanation:Here flag is initialized to zero. 'while' loop repeats until the value of flag is zero, increments i by 1. 'if' conditionchecks whether number 54 is found. If found, value of flag is set to 1 and 'while' loop terminates. C
Topic: Variables
What is the difference between 'for' and 'while' loops?
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