Suppose we have two values k and n. Consider a random permutation say p1, p2, ..., pn of first n natural numbers numbers 1, 2, ..., n and calculate the value F, such that F = (X2+...+Xn-1)k, where Xi is an indicator random variable, which is 1 when one of ... Read More

Suppose we have a value n. We have to print Decimal, Octal, Hexadecimal and Binary equivalent of first n numbers (1 to n) in four different columns. As we know, we can express the numbers with prefix characters d, o, X and b for decimal, octal, hexadecimal and decimal respectively.So, ... Read More

Suppose we have two numbers n and m, m will be multiple of n. We have to draw a door mat pattern with a word say "WELCOME" in the middle. The mat size will be n x m. We have to make this mat using dots(.), hyphens (-), pipe symbols ... Read More

Suppose we have a string s and width w. We have to wrap this text into a paragraph with width w. This can be done very easily with fill() function present inside textwrap library. So we have to import textwrap library first.So, if the input is like s = "The ... Read More

Suppose we have a number n. We have to draw a diamond pattern with asterisks with 2n-1 lines. First 1 to n lines contain 1 to n number of asterisks, and next they are decreasing from n-1 to 1.So, if the input is like n = 5, then the output ... Read More

Suppose we have a string s. We have to check whether the string contains the following or not.NumbersLowercase lettersUppercase lettersNote − There may be some other symbols, but these three must be thereSo, if the input is like s = "p25KDs", then the output will be TrueTo solve this, we ... Read More

Suppose we have a string s and a substring t. We have to count how many times t occurs in s.So, if the input is like s = "abaabcaabababaab", t = "aab", then the output will be 3 because the substrings are ab(aab)c(aab)abab(aab).To solve this, we will follow these steps ... Read More

Suppose we have a string s, an index i and a character c. We have to replace the ith character of s using c. Now in Python, strings are immutable in nature. We cannot write a statement like s[i] = c, it will raise an error [TypeError: 'str' object does ... Read More

Suppose we have few words that are separated by spaces. We have to split these words to form a list, then join them into a string by placing comma in-between.So, if the input is like s = "Programming Python Language Easy Funny", then the output will be Programming, Python, Language, ... Read More

Suppose we have a string with English letters. We have to swap the case of the letters. So uppercase will be converted to lower and lowercase converted to upper.So, if the input is like s = "PrograMMinG", then the output will be pROGRAmmINgTo solve this, we will follow these steps ... Read More