Check If The Sentence Is Pangram · Interview Problem

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Leetcode

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Check If The Sentence Is Pangram

Determine whether a sentence contains every letter of the English alphabet at least once.

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Problem Statement

Problem

Given a sentence consisting of lowercase English letters and spaces, determine whether it is a pangram.

A pangram is a sentence that contains every letter from a to z at least once.

Return true if the sentence is a pangram, otherwise return false.

Notes

Ignore spaces.
Letter case is not a concern in the standard version of this problem, since the input is typically lowercase.
A letter only needs to appear once to count toward the pangram condition.

Input Format

A single string sentence.
The string contains lowercase English letters and may contain spaces.

Output Format

Return a boolean value:
- true if sentence is a pangram
- false otherwise

Constraints

1 <= sentence.length <= 1000 in the typical LeetCode version.
sentence contains only lowercase English letters and spaces.

Examples

Sample cases returned by the problem API.

Example 1

Input

sentence = "thequickbrownfoxjumpsoverthelazydog"

Output

true

Explanation

This sentence contains every letter from a to z at least once.

Example 2

Input

sentence = "leetcode"

Output

false

Explanation

Several letters of the alphabet do not appear in the sentence.

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