random.triangular() method in Python (original) (raw)

Last Updated : 17 May, 2020

**triangular()** is an inbuilt method of the random module. It is used to return a random floating point number within a range with a bias towards one extreme.

Syntax : random.triangular(low, high, mode)

Parameters :
low : the lower limit of the random number
high : the upper limit of the random number
mode : additional bias; low < mode < high

if the parameters are (10, 100, 20) then due to the bias, most of the random numbers generated will be closer to 10 as opposed to 100.

Returns : a random floating number

Example 1:

import random

low = 10

high = 100

mode = 20

print (random.triangular(low, high, mode))

Output :

22.614510550239572

Example 2: If we generate the number multiple times we can probably identify the bias.

import random

low = 10

high = 100

mode = 20

for i in range ( 10 ):

`` print (random.triangular(low, high, mode))

Output :

58.645768016894735 46.690692250503226 33.57590419190895 52.331804090351305 33.09451214875767 12.03845752596168 32.816080679206294 20.4739124559502 82.49208123077557 63.511062284733015

Example 3: We can visualize the triangular pattern by plotting a graph.

import random

import matplotlib.pyplot as plt

nums = []

low = 10

high = 100

mode = 20

for i in range ( 10000 ):

`` temp = random.triangular(low, high, mode)

`` nums.append(temp)

plt.hist(nums, bins = 200 )

plt.show()

Output :

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