Write a loop to read as many as numbers till you enter '-99' (if your input is -99 go out from the loop), and find a) how many numbers Less than 50. b) how many numbers Greater than 100. c) how many +ve numbers d) how many -ve numbers e) how many numbers in between 51 and 99.

Sure, here's the code to solve your problem:

# Initializing variables
num_less_than_50 = 0
num_greater_than_100 = 0
num_positive = 0
num_negative = 0
num_between_51_and_99 = 0

# Loop to read input numbers
while True:
    num = int(input("Enter a number (or -99 to exit): "))
    if num == -99:
        break
    
    # Checking conditions
    if num < 50:
        num_less_than_50 += 1
    elif num > 100:
        num_greater_than_100 += 1
        
    if num > 0:
        num_positive += 1
    elif num < 0:
        num_negative += 1
        
    if num > 51 and num < 99:
        num_between_51_and_99 += 1

# Printing the results
print("Numbers less than 50:", num_less_than_50)
print("Numbers greater than 100:", num_greater_than_100)
print("Positive numbers:", num_positive)
print("Negative numbers:", num_negative)
print("Numbers between 51 and 99:", num_between_51_and_99)

You can run this code and enter numbers as many times as you want until you enter -99. The program will then display how many numbers are less than 50, greater than 100, positive, negative, and between 51 and 99.