Types of Looping Statements in C Language
In C language, there are primarily three types of looping statements:
- for loop
- while loop
- do...while loop
Each of these loops allows for repeated execution of a block of code based on a condition.
Difference Between For Loop and Do...While Loop
1. Syntax
- For Loop:
The for loop starts with the initialization of a variable, checks the condition, and then executes the block of code.
c
for (initialization; condition; increment/decrement) {
// Code to be executed
}
- Do...While Loop:
The do...while loop executes the block of code before checking the condition, ensuring that the code runs at least once.
c
do {
// Code to be executed
} while (condition);
2. Execution Flow
- For Loop:
- Initializes a counter.
- Checks the condition before executing the block.
- If the condition is false initially, the block may never execute.
- Do...While Loop:
- Executes the block first, then checks the condition.
- Guarantees that the block runs at least once, regardless of the condition.
Example
- For Loop Example:
c
for (int i = 0; i < 5;="" i++)="" />
printf("%d ", i); // Output: 0 1 2 3 4
}
- Do...While Loop Example:
c
int i = 0;
do {
printf("%d ", i); // Output: 0 1 2 3 4
i++;
} while (i < />
Conclusion
In summary, the key difference lies in the execution order and the guarantee of code execution. The for loop checks conditions before execution, while the do...while loop ensures execution at least once.