Enter two integers to check.
-4
-4
Result: -4=-4
C Programming for Loop
C Programming Loops
Loops causes program to execute the certain block of code repeatedly until some conditions are satisfied, i.e.,loops are used in performing repetitive work in programming.
Suppose you want to execute some code/s 100 times. You can perform it by writing that code/s only one time and repeat the
execution 100 times using loop.
There are 3 types of loops in C programming:
1. for loop
2. while loop
3. do...while loop
for Loop Syntax
for(initial expression; test expression; update expression)
{
code/s to be executed;
}
How for loop works in C programming?
The initial expression is initialized only once at the beginning of the for loop. Then, the test expression is checked by the program. If the test expression is false, for loop is terminated. But, if test expression is true then, the codes are executed and update expression is updated. Again, the test expression is checked. If it is false, loop is terminated and if it is true, the same process repeats until test expression is false.
This flowchart describes the working of for loop in C programming.
for loop example
Write a program to find the sum of first n natural numbers where n is entered by user. Note: 1,2,3... are called natural