Resistor color code

The color code is read as follows:
1: Start with the band closest to one end of the resistor. The first band is the first digit of the resistance value.
2: The second band is the second digit of the resistance value.
3: The third band is the number of zeros following the second digit, or the multiplier.
4: The fourth band indicates the percent tolerance and is usually gold or silver.

For example, a 5% tolerance means that the actual resistance value is within ±5% of the color-coded value. Thus, a 100Ω resistor with a tolerance of ±5% can have an acceptable range of values from a minimum of 95Ω to a maximum of 105Ω.

Alphanumeric Labeling:-

Two or three digits, and one of the letters R, K, or M are used to identify a resistance value.

The letter is used to indicate the multiplier, and its position is used to indicate decimal point position.