13 Jan Loops in C Programming
Loops are used when you need to repeat a part of the program. In C, we have loops; through which we can repeat a part of the program until a condition is satisfied. In this lesson, we will learn how to work with loops in C Programming.
Here are the loops,
- while loop
- do-while loop
- for loop
while loop
The while loop in C language is used when you want to repeat a part of the program a fixed number of times. This is specified as a condition.
For example, marks of students with more than 75 in Maths.
Syntax
The following is the syntax of the while loop in C Language,
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loop counter initialization; while (condition is true) { statement1; statement2; . . . loop counter increment; } |
The following is an example showing the usage of the while loop in C Language,
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#include <stdio.h> void main() { int i = 50; printf("Displaying Values!\n"); // while loop condition while( i < 55 ) { printf("i = %d\n", i); i++; } getch(); } |
The following is the output,
do-while loop
The do-while is the same as while, but the do-while executes the statement first and then the condition is tested.
Syntax
The following is the syntax of using the do-while loop in C Language,
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loop counter initialization; do { Statement1; Statement2; . . . loop counter increment; } while(condition is true) |
The following is an example showing the usage of the do-while loop in C Language,
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#include <stdio.h> void main() { int i = 50; printf("Displaying Values!\n"); do { printf("i = %d\n", i); i++; } while( i < 55 ); getch(); } |
The following is the output showing the usage of the do-while loop in C Language,
for Loop
The for loop is a loop that executes a specified number of times. Under this, initialize, test, and increment loop counter in a single line, unlike the while and do-while loop.
Syntax
The syntax of for loop shows the usage of the loop counter, its initialization, as well as condition,
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for (initialize loop counter; test loop counter; loop counter increment) { Statement1; Statement2; . . . } |
The following is an example showing the usage of for loop in C language,
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#include <stdio.h> void main () { int i; for( i = 0; i < 5; i++ ) { printf("i = %d\n", i); } getch(); } |
The output shows the value of i iterated five times with for loop,
In this lesson, we learned how to work with loops in C Language. We saw the implementation of the while loop, do-while loop, for loop, break statement, and continue statement.
Let us now learn about the break and continue statements in C with examples.
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