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For Loops

Created: Monday, 12 August 2013 Written by Ehab Eldeeb

There are generally three types of loops in C

you can use either of them depending on the situation

Note: This is a rough and fast explanation

For Loop: You know where to start (start value) and where to end (final value) and increment/decrement value

While Loop: You start (initial value) but you don't know where to end, so you put a condition for stopping
example: while (n > 0) ...

Do-While Loop: Similar to While loop with just one difference, which is... you get to process the code once before checking the condition
example: do { ....... } while ( n > 0); // notice there's a semicolon here

Syntax

For Loop:

for ( initial ; condition ; increment/decrement){
code statements;
}

Example:
for(int i = 0; i < 10; i++){
printf("Ehab Eldeeb is awesome \n");
}

This for loop will be repeated 10 times..
The statement says Ehab Eldeeb is awesome, so it will print out that sentence 10 times :)

While Loop:

while(condition){
statements;
}

Example:
int x = 10;
while(x > 5){
printf("Ehab Eldeeb is awesome");
i--;
}

this while loop will print out Ehab Eldeeb is awesome until the value of x gets changed and becomes <= 5

Do-While Loop:

Do-While is similar to while loop but the statement will be processed once even if the condition is false.