﻿ Python Exercise: Print out the first n rows of Pascal's triangle - w3resource # Python Exercise: Print out the first n rows of Pascal's triangle

## Python Functions: Exercise-13 with Solution

Write a Python function that that prints out the first n rows of Pascal's triangle.

Note : Pascal's triangle is an arithmetic and geometric figure first imagined by Blaise Pascal.

Sample Pascal's triangle : Each number is the two numbers above it added together

Sample Solution :-

Python Code :

``````def pascal_triangle(n):
trow = 
y = 
for x in range(max(n,0)):
print(trow)
trow=[l+r for l,r in zip(trow+y, y+trow)]
return n>=1
pascal_triangle(6)
```
```

Sample Output:

```
[1, 1]
[1, 2, 1]
[1, 3, 3, 1]
[1, 4, 6, 4, 1]
[1, 5, 10, 10, 5, 1]
```

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## Python: Tips of the Day

Creates a dictionary with the same keys as the provided dictionary and values generated by running the provided function for each value

Example:

```def tips_map_values(obj, fn):
ret = {}
for key in obj.keys():
ret[key] = fn(obj[key])
return ret
users = {
'Owen': { 'user': 'Owen', 'age': 29 },
'Eddie': { 'user': 'Eddie', 'age': 15 }
}

print(tips_map_values(users, lambda u : u['age'])) # {'Owen': 29, 'Eddie': 15}
```

Output:

```{'Owen': 29, 'Eddie': 15}
```