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# Count of alphabets having ASCII value less than and greater than k in C++

We are given a string of any length and the task is to calculate the count of alphabets having ASCII values less than or greater than or equals to the given integer value k.

## ASCII value for character A-Z are given below

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S |

65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 |

T | U | V | W | X | Y | Z |

84 | 85 | 86 | 87 | 88 | 89 | 90 |

## ASCII value for characters a-z are given below

a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r | s |

97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 114 |

t | u | v | w | x | y | z |

116 | 117 | 118 | 119 | 120 | 121 | 122 |

**Input** − str = “TuTorials PoinT”, int k = 100

**Output** −

Count of alphabets having ASCII value less than k are − 6

Count of alphabets having ASCII value equals or greater than k are − 9

**Explanation** −

We are given with k as 100 so we will check ASCII values of the characters in the string. So, ASCII value of T is 84 < 100, u is 117 > 100, o is 111 > 100, r is 114 > 100, i is 105 > 100, a is 97 < 100, l is 108 > 100, s is 115 > 100, P is 80 < 100, n is 110 > 100. Therefore, total count of alphabets having ASCII value less than k are 6 and total count of alphabets having ASCII value equals or greater than k are 9

**Input** − str = “HellO All”, int k = 90

**Output** −

Count of alphabets having ASCII value less than k are − 3

Count of alphabets having ASCII value equals or greater than k are − 5

**Explanation** −

We are given with k as 100 so we will check ASCII values of the characters in the string. So, ASCII value of H is 72 < 90, e is 101 > 90, l is 108 > 100, l is 108 > 100, O is 79 < 90, A is 65 < 90, l is 108 > 100, l is 108 > 100. Therefore, total count of alphabets having ASCII value less than k are 3 and total count of alphabets having ASCII value equals or greater than k are 5

## Approach used in the below program is as follows

Input the string of uppercase and lowercase letters and an integer values of k

Calculate the length of a string using str.length() function and pass it to the function for further processing.

Create a temporary variable count to store the value less than k and set it to 0

Start loop FOR from i to 0 till the length of a string

Inside the loop, check IF str[i] < k then increments the count by 1.

Return the count for values less than k

To calculate the count for values greater than k set int greater = len - Less_than(str,k, len);

Print the result.

## Example

#include <bits/stdc++.h> using namespace std; //Count of alphabets having ASCII value less than and greater than k int Less_than(string str, int k, int length){ int count = 0; for (int i = 0; i < length; i++){ if (str[i] < k){ count++; } } return count; } int main(){ string str = "TuTorials PoinT"; int k = 100; int len = str.length(); cout<<"Count of alphabets having ASCII value less than k are: "<<Less_than(str,k, len); int greater = len - Less_than(str,k, len); cout<<"\nCount of alphabets having ASCII value equals or greater than k are: "<<greater; return 0; }

## Output

If we run the above code it will generate the following output −

Count of alphabets having ASCII value less than k are: 6 Count of alphabets having ASCII value equals or greater than k are: 9

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