Contents

## Python Flip a Coin

In this tutorial, we shall learn to write a function, that randomly returns True or False corresponding to a Head or Tail for the experiment of flipping a coin.

To randomly select on of the two possible outcomes, you can use random.choice() function, with the two outcomes passed as list elements. Or you can use random.random() function that returns a floating point and decide one of the two possible outcomes based on the output range.

### Example 1: Python Function to Flip a Coin

In this example, we shall write a function, called flipCoin(). This function returns True or False randomly with each call.

As already mentioned in the introduction, we shall call random.choice() with the list `[True, False]`

passed as argument.

**Python Program**

```
import random
import string
def flipCoin():
return random.choice([True,False])
for i in range(0,5):
print(flipCoin())
```

Run We have called flipCoin() function multiple times using a Python For Loop to demonstrate the randomness of the returned value.

**Output**

```
False
True
True
False
True
```

Please note that there is no control on the number of `True`

s or `False`

s returned for a limited function calls of flipCoin().

As the number of times you flip a coin tend to a very large number or infinity, the probability of Head or False tend to `0.5`

.

### Example 2: Flip a Coin Experiment using random.random()

random.random() function returns a floating value in the range (0,1). You can decide that the flipping a coin results in Head if random.random() returns a value in between 0 and 0.5, and a Tail if random.random() returns a value between 0.5 and 1.

In this example, we shall use random.random() function to programmatically implement the experiment of flipping a coin.

**Python Program**

```
import random
import string
def flipCoin():
f = random.random()
return True if f<0.5 else False
for i in range(0,5):
print(flipCoin())
```

Run **Output**

```
True
False
False
True
False
```

### Summary

In this tutorial of Python Examples, we learned how to use **random** package to programmatically implement the experiment: Flip a Coin.