In programming language, a loop is a sequence of instruction s that is used repeated until a certain condition is execute in a program. Generally this type of process is done, as getting an item of data and changing it, and then some condition is checked.
Let's consider the below example a situation
where you want to print Welcome to
Programming! five times.
#include <stdio.h>
void main()
{
printf(
"Welcome to Programming!\n");
printf( "Welcome
to Programming!\n");
printf( "Welcome
to Programming!\n");
printf( "Welcome
to Programming!\n");
printf( "Welcome
to Programming!\n");
}
Output:
Welcome to Programming!
Welcome to Programming!
Welcome to Programming!
Welcome to Programming!
Welcome to Programming!
Now do same example with loop
#include <stdio.h>
void main()
{
int i = 0;
while ( i < 5 )
{
printf( "Welcome to
Programming!\n");
i = i + 1;
}
}
Output:
Welcome to Programming!
Welcome to Programming!
Welcome to Programming!
Welcome to Programming!
Welcome to Programming!
The above mentioned program will use of a while loop,
which is used to execute programming statements enclosed within this type of brackets
{....}. Here, the computer system first checks whether the given condition is
matched or not, i.e., variable "i" is less than 5 or not and if it
finds the condition is true, then the loop body is entered to execute the given
statements as above mentioned.
C contains following topics at
TCCI
Introduction to C, Basic Syntax, Token, Data
Types and Variables, Constants, Literals, Storage class, Operators, Loop
Controls, For Loop, While Loop, Do-While Loop, Decision Making, Arrays, String,
Function, Pointer, Structure, Union, Type Casting, Recursion, Files, Command
Line Argument.
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